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1 Summary of changes for version 2.1.x: |
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2 ------------------------------------ |
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3 |
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4 * The built-in variable argv is now a list of strings instead of a |
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5 string vector. |
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6 |
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7 * The value of LOADPATH set by the environment variable |
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8 OCTAVE_PATH, the -p or --path command line options, or on the |
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9 command line is no longer modified to include the default path. |
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10 Instead it is left as specified. Its default value is now ":", |
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11 which tells Octave to search the default path, and the new |
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12 built-in variable DEFAULT_LOADPATH contains the default list of |
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13 directories to search. |
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14 |
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15 * The function file_in_path no longer does any special processing of |
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16 its PATH argument. To search LOADPATH for files, it is now |
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17 generally better to use the new function file_in_loadpath. |
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18 |
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19 * If fread is given a skip parameter, the skip is performed after |
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20 the read instead of before (for compatibility with Matlab). |
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21 |
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22 * The new built-in variable `crash_dumps_octave_core' controls |
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23 whether Octave writes user variables to the file `octave-core' |
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24 when it crashes or is killed by a signal. The default value is 1 |
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25 (0 if you use --traditional). |
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26 |
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27 * If LOADPATH contains a doubled colon, the default path is inserted |
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28 in its place. This is similar to the substitution that also takes |
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29 place for leading or trailing colons in the LOADPATH. |
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30 |
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31 * Loops of the form `for i = STRING ... endfor' are now allowed. |
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32 |
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33 * It is now possible to set the iteration limit for lsode using |
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34 lsode_options ("step limit", N). |
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35 |
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36 * New functions: |
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37 |
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38 is_complex -- tell whether a variable is complex |
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39 rehash -- re-initialize the cache of directories in LOADPATH |
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40 graw -- send a string to the gnuplot subprocess |
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41 |
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42 * New functions from Kurt Hornik's Octave-ci package: |
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43 |
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44 In finance (new directory): |
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45 |
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46 fv -- future value of an investment |
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47 fvl -- future value of an initial lump sum investment |
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48 irr -- internal rate of return of an investment |
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49 nper -- number of payments needed for amortizing a loan |
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50 npv -- net present value of a series of payments |
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51 pmt -- amount of periodic payment needed to amortize a loan |
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52 pv -- present value of an investment |
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53 pvl -- present value of an investment that pays off at the end |
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54 rate -- rate of return of an investment |
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55 vol -- volatility of financial time series data |
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56 |
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57 In linear-algebra: |
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58 |
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59 dmult -- rescale the rows of a matrix |
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60 |
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61 In signal: |
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62 |
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63 arch_fit -- fit an ARCH regression model |
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64 arch_rnd -- simulate an ARCH process |
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65 arch_test -- test for conditional heteroscedascity |
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66 arma_rnd -- simulate an ARMA process |
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67 autocor -- compute autocorrelations |
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68 autocov -- compute autocovariances |
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69 autoreg_matrix -- design matrix for autoregressions |
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70 bartlett -- coefficients of the Bartlett (triangular) window |
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71 blackman -- coefficients of the Blackman window |
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72 diffpara -- estimate the fractional differencing parameter |
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73 durbinlevinson -- perform one step of the Durbin-Levinson algorithm |
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74 fractdiff -- compute fractional differences |
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75 hamming -- coefficients of the Hamming window |
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76 hanning -- coefficients of the Hanning window |
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77 hurst -- estimate the Hurst parameter |
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78 periodogram -- compute the periodogram |
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79 rectangle_lw -- rectangular lag window |
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80 rectangle_sw -- rectangular spectral window |
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81 sinetone -- compute a sine tone |
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82 sinewave -- compute a sine wave |
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83 spectral_adf -- spectral density estimation |
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84 spectral_xdf -- spectral density estimation |
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85 spencer -- apply Spencer's 15-point MA filter |
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86 stft -- short-term Fourier transform |
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87 synthesis -- recover a signal from its short-term Fourier transform |
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88 triangle_lw -- triangular lag window |
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89 triangle_sw -- triangular spectral window |
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90 yulewalker -- fit AR model by Yule-Walker method |
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91 |
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92 In statistics/base (new directory): |
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93 |
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94 center -- center by subtracting means |
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95 cloglog -- complementary log-log function |
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96 cor -- compute correlations |
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97 cov -- compute covariances |
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98 cut -- cut data into intervals |
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99 iqr -- interquartile range |
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100 kendall -- kendall's rank correlation tau |
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101 logit -- logit transformation |
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102 mean -- compute arithmetic, geometric, and harmonic mean |
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103 meansq -- compute mean square |
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104 moment -- compute moments |
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105 ppplot -- perform a PP-plot (probability plot) |
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106 probit -- probit transformation |
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107 qqplot -- perform a QQ-plot (quantile plot) |
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108 range -- compute range |
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109 ranks -- compute ranks |
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110 run_count -- count upward runs |
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111 spearman -- spearman's rank correlation rho |
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112 statistics -- compute basic statistics |
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113 studentize -- subtract mean and divide by standard deviation |
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114 table -- cross tabulation |
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115 values -- extract unique elements |
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116 var -- compute variance |
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117 |
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118 In statistics/distributions (new directory): |
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119 |
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120 beta_cdf -- CDF of the Beta distribution |
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121 beta_inv -- Quantile function of the Beta distribution |
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122 beta_pdf -- PDF of the Beta distribution |
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123 beta_rnd -- Random deviates from the Beta distribution |
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124 |
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125 binomial_cdf -- CDF of the binomial distribution |
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126 binomial_inv -- Quantile function of the binomial distribution |
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127 binomial_pdf -- PDF of the binomial distribution |
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128 binomial_rnd -- Random deviates from the binomial distribution |
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129 |
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130 cauchy_cdf -- CDF of the Cauchy distribution |
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131 cauchy_inv -- Quantile function of the Cauchy distribution |
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132 cauchy_pdf -- PDF of the Cauchy distribution |
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133 cauchy_rnd -- Random deviates from the Cauchy distribution |
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134 |
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135 chisquare_cdf -- CDF of the chi-square distribution |
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136 chisquare_inv -- Quantile function of the chi-square distribution |
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137 chisquare_pdf -- PDF of the chi-sqaure distribution |
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138 chisquare_rnd -- Random deviates from the chi-square distribution |
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139 |
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140 discrete_cdf -- CDF of a discrete distribution |
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141 discrete_inv -- Quantile function of a discrete distribution |
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142 discrete_pdf -- PDF of a discrete distribution |
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143 discrete_rnd -- Random deviates from a discrete distribution |
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144 |
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145 empirical_cdf -- CDF of the empirical distribution |
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146 empirical_inv -- Quantile function of the empirical distribution |
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147 empirical_pdf -- PDF of the empirical distribution |
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148 empirical_rnd -- Bootstrap samples from the empirical distribution |
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149 |
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150 exponential_cdf -- CDF of the exponential distribution |
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151 exponential_inv -- Quantile function of the exponential distribution |
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152 exponential_pdf -- PDF of the exponential distribution |
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153 exponential_rnd -- Random deviates from the exponential distribution |
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154 |
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155 f_cdf -- CDF of the F distribution |
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156 f_inv -- Quantile function of the F distribution |
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157 f_pdf -- PDF of the F distribution |
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158 f_rnd -- Random deviates from the F distribution |
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159 |
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160 gamma_cdf -- CDF of the Gamma distribution |
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161 gamma_inv -- Quantile function of the Gamma distribution |
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162 gamma_pdf -- PDF of the Gamma distribution |
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163 gamma_rnd -- Random deviates from the Gamma distribution |
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164 |
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165 geometric_cdf -- CDF of the geometric distribution |
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166 geometric_inv -- Quantile function of the geometric distribution |
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167 geometric_pdf -- PDF of the geometric distribution |
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168 geometric_rnd -- Random deviates from the geometric distribution |
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169 |
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170 hypergeometric_cdf -- CDF of the hypergeometric distribution |
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171 hypergeometric_inv -- Random deviates from hypergeometric distribution |
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172 hypergeometric_pdf -- PDF of the hypergeometric distribution |
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173 hypergeometric_rnd -- Random deviates from hypergeometric distribution |
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174 |
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175 kolmogorov_smirnov_cdf -- CDF of the Kolmogorov-Smirnov distribution |
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176 |
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177 laplace_cdf -- CDF of the Laplace distribution |
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178 laplace_inv -- Quantile function of the Laplace distribution |
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179 laplace_pdf -- PDF of the Laplace distribution |
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180 laplace_rnd -- Random deviates from the Laplace distribution |
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181 |
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182 logistic_cdf -- CDF of the logistic distribution |
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183 logistic_inv -- Quantile function of the logistic distribution |
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184 logistic_pdf -- PDF of the logistic distribution |
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185 logistic_rnd -- Random deviates from the logistic distribution |
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186 |
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187 lognormal_cdf -- CDF of the log normal distribution |
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188 lognormal_inv -- Quantile function of the log normal distribution |
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189 lognormal_pdf -- PDF of the log normal distribution |
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190 lognormal_rnd -- Random deviates from the log normal distribution |
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191 |
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192 normal_cdf -- CDF of the normal distribution |
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193 normal_inv -- Quantile function of the normal distribution |
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194 normal_pdf -- PDF of the normal distribution |
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195 normal_rnd -- Random deviates from the normal distribution |
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196 |
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197 pascal_cdf -- CDF of the Pascal (negative binomial) distribution |
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198 pascal_inv -- Quantile function of the Pascal distribution |
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199 pascal_pdf -- PDF of the Pascal (negative binomial) distribution |
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200 pascal_rnd -- Random deviates from the Pascal distribution |
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201 |
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202 poisson_cdf -- CDF of the Poisson distribution |
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203 poisson_inv -- Quantile function of the Poisson distribution |
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204 poisson_pdf -- PDF of the Poisson distribution |
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205 poisson_rnd -- Random deviates from the Poisson distribution |
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206 |
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207 stdnormal_cdf -- CDF of the standard normal distribution |
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208 stdnormal_inv -- Quantile function of standard normal distribution |
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209 stdnormal_pdf -- PDF of the standard normal distribution |
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210 stdnormal_rnd -- Random deviates from standard normal distribution |
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211 |
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212 t_cdf -- CDF of the t distribution |
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213 t_inv -- Quantile function of the t distribution |
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214 t_pdf -- PDF of the t distribution |
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215 t_rnd -- Random deviates from the t distribution |
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216 |
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217 uniform_cdf -- CDF of the uniform distribution |
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218 uniform_inv -- Quantile function of the uniform distribution |
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219 uniform_pdf -- PDF of the uniform distribution |
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220 uniform_rnd -- Random deviates from the uniform distribution |
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221 |
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222 weibull_cdf -- CDF of the Weibull distribution |
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223 weibull_inv -- Quantile function of the Weibull distribution |
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224 weibull_pdf -- PDF of the Weibull distribution |
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225 weibull_rnd -- Random deviates from the Weibull distribution |
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226 |
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227 wiener_rnd -- Simulate a Wiener process |
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228 |
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229 In statistics/models (new directory): |
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230 |
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231 logistic_regression -- ordinal logistic regression |
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232 logistic_regression_derivatives -- derivates of log-likelihood |
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233 in logistic regression |
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234 logistic_regression_likelihood -- likelihood in logistic regression |
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235 |
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236 In statistics/tests (new directory): |
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237 |
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238 anova -- one-way analysis of variance |
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239 bartlett_test -- bartlett test for homogeneity of variances |
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240 chisquare_test_homogeneity -- chi-square test for homogeneity |
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241 chisquare_test_independence -- chi-square test for independence |
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242 cor_test -- test for zero correlation |
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243 f_test_regression -- test linear hypotheses in linear |
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244 regression model |
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245 hotelling_test -- test for mean of a multivariate normal |
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246 hotelling_test_2 -- compare means of two multivariate normals |
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247 kolmogorov_smirnov_test -- one-sample Kolmogorov-Smirnov test |
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248 kolmogorov_smirnov_test_2 -- two-sample Kolmogorov-Smirnov test |
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249 kruskal_wallis_test -- kruskal-Wallis test |
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250 manova -- one-way multivariate analysis of variance |
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251 mcnemar_test -- mcnemar's test for symmetry |
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252 prop_test_2 -- compare two proportions |
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253 run_test -- run test for independence |
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254 sign_test -- sign test |
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255 t_test -- student's one-sample t test |
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256 t_test_2 -- student's two-sample t test |
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257 t_test_regression -- test one linear hypothesis in linear |
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258 regression model |
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259 u_test -- mann-Whitney U-test |
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260 var_test -- f test to compare two variances |
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261 welch_test -- welch two-sample t test |
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262 wilcoxon_test -- wilcoxon signed-rank test |
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263 z_test -- test for mean of a normal sample with |
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264 known variance |
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265 z_test_2 -- compare means of two normal samples with |
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266 known variances |
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267 |
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268 * The save command now accepts the option -append to save the |
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269 variables at the end of the file, leaving the existing contents. |
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270 |
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271 * New command-line option --no-history (also available using the |
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272 single character option -H) inhibits saving command history. |
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273 |
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274 * The mkoctfile script now accepts -DDEF options and passes them on |
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275 to the C and C++ compilers. |
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276 |
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277 * Running `make check' should work now before you run `make install', |
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278 even if you build a copy of Octave that depends on shared versions |
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279 of the Octave libraries. |
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280 |
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281 * For matrices, x(:) now works no matter what the value of |
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282 do_fortran_indexing is. |
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283 |
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284 * New keywords __FILE__ and __LINE__ expand to the name of the file |
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285 that is being read and the current input line number, respectively. |
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286 |
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287 * Octave's expression parser is more general and consistent. It is |
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288 now possible to access structure elements and index arbitrary |
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289 values. For example, expressions like |
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290 |
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291 my_home_dir = getpwuid (getuid ()) . dir; |
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292 |
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293 and |
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294 |
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295 svd (x) (1:5) |
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296 |
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297 now work. |
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298 |
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299 * New built-in variable `print_rhs_assign_val' controls what is |
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300 printed when an assignment expression is evaluated. If it is |
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301 zero, the value of the variable on the left hand side (after the |
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302 assignment) is printed. If it is nonzero, the value of the right |
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303 hand side (i.e., the result of the expression) is printed. The |
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304 default value of is zero, so the behavior is the same as in |
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305 previous versions of Octave. |
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306 |
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307 * tmpnam now takes two optional arguments, DIR, and PREFIX. For |
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308 example, tmpnam ("/foo", "bar-") returns a file name like |
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309 "/foo/bar-10773baa". If DIR is omitted or empty, the value of the |
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310 environment variable TMPDIR, or /tmp is used. If PREFIX is |
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311 omitted, "oct-" is used. |
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312 |
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313 * The built-in variable `PWD' has been removed. If you need to get |
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314 the value of the current working directory, use the pwd() function |
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315 instead. |
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316 |
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317 * New operators. Octave's parser now recognizes the following |
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318 operators: << >> += -= *= /= .+= .-= .*= ./= &= |= <<= >>=. So |
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319 far, there are only a few operations defined that actually use |
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320 them (this should change before 2.1 is released). |
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321 |
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322 * New built-in data types: |
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323 |
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324 logical: |
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325 |
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326 A true value is represented by 1, and false value by 0. |
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327 Comparison operations like <, <=, ==, >, >=, and != now return |
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328 logical values. Indexing operations that use zero-one style |
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329 indexing must now use logical values. You can use the new |
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330 function logical() to convert a numeric value to a logical |
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331 value. This avoids the need for the built-in variable |
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332 `prefer_zero_one_indexing', so it has been removed. Logical |
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333 values are automatically converted to numeric values where |
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334 appropriate. |
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335 |
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336 file: |
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337 |
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338 A file object represents an open Octave stream object. The |
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339 fopen function now returns a file object instead of an integer. |
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340 File objects can be converted to integers automatically, and the |
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341 other functions that work with file ids still work with |
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342 integers, so this change should be backward compatible. |
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343 |
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344 The binary left-shift operator `<<' has been defined to work as |
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345 in C++ for file objects and built-in types. For example, |
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346 |
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347 my_stream = fopen ("foo", "w"); |
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348 my_stream << "x = " << pi << " marks the spot\n"; |
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349 |
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350 writes `x = 3.1416 marks the spot' in the file foo. |
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351 |
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352 The built-in variables stdin, stdout, and stderr are now also |
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353 file objects instead of integers. |
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354 |
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355 list: |
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356 |
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357 A list is an array of Octave objects. It can be indexed using |
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358 the normal indexing operator. For example, |
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359 |
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360 x = list ([1,2;3,4], 1, "foo"); |
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361 stdout << x(2) << "\n" |
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362 1 |
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363 stdout << x; |
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364 ( |
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365 [1] = |
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366 |
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367 1 2 |
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368 3 4 |
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369 |
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370 [2] = 1 |
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371 [3] = foo |
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372 ) |
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373 |
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374 There is currently no special syntax for creating lists; you |
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375 must use the list function. |
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376 |
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377 * Commas in global statements are no longer special. They are now |
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378 treated as command separators. This removes a conflict in the |
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379 grammar and is consistent with the way Matlab behaves. The |
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380 variable `warn_comma_in_global_decl' has been eliminated. |
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381 |
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382 * It is now possible to declare static variables that retain their |
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383 values across function calls. For example, |
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384 |
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385 function ncall = f () static n = 0; ncall = ++n; endfunction |
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386 |
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387 defines a function that returns the number of times that it has |
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388 been called. |
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389 |
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390 * Within user-defined functions, the new automatic variable `argn' |
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391 contains the names of the arguments that were passed to the |
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392 function. For example, |
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393 |
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394 function f (...) |
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395 for i = 1:nargin |
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396 stdout << "argn(" << i << ") = `" << deblank (argn(i,:)) \ |
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397 << "' and its value is " << va_arg () << "\n"; |
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398 endfor |
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399 endfunction |
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400 f (1+2, "foo", sin (pi/2)) |
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401 |
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402 prints |
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403 |
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404 argn(1) = `1 + 2' and its value is 3 |
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405 argn(2) = `"foo"' and its value is foo |
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406 argn(3) = `sin (pi)' and its value is 1 |
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407 |
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408 on the standard output stream. If nargin is zero, argn is not defined. |
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409 * Functions like quad, fsolve, and lsode can take either a function |
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410 name or a simple function body as a string. For example, |
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411 |
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412 quad ("sqrt (x)", 0, 1) |
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413 |
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414 is equivalent to |
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415 |
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416 function y = f (x) y = sqrt (x); endfunction |
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417 quad ("f", 0, 1) |
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418 |
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419 * If the argument to eig() is symmetric, Octave uses the specialized |
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420 Lapack subroutine for symmetric matrices for a significant |
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421 increase in performance. |
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422 |
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423 * If the argument to lsode that names the user-supplied function is |
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424 a 2-element string array, the second element is taken as the name |
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425 of the Jacobian function. The named function should have the |
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426 following form: |
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427 |
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428 JAC = f (X, T) |
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429 |
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430 where JAC is the Jacobian matrix of partial derivatives of the |
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431 right-hand-side functions that define the set of differential |
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432 equations with respect to the state vector X. |
|
|
433 |
|
3107
|
434 * Global variables are now initialized to the empty matrix, for |
|
|
435 compatibility with Matlab. |
|
|
436 |
|
|
437 * Explicit initialization of global variables only happens once. |
|
|
438 For example, after the following statements are evaluated, g still |
|
|
439 has the value 1. |
|
|
440 |
|
|
441 global g = 1 |
|
|
442 global g = 2 |
|
|
443 |
|
|
444 This is useful for initializing global variables that are used to |
|
|
445 maintain state information that is shared among several functions. |
|
|
446 |
|
2930
|
447 * Structure elements completion on the command line actually works |
|
|
448 now. |
|
|
449 |
|
3105
|
450 * The new built-in variable `fixed_point_format' controls whether |
|
|
451 Octave uses a scaled fixed-point format for displaying matrices. |
|
|
452 The default value is 0 unless you use --traditional. |
|
|
453 |
|
|
454 * The function sumsq now computes sum (x .* conj (x)) for complex values. |
|
|
455 |
|
3131
|
456 * The new built-in variable max_recursion_depth allows you to |
|
|
457 prevent Octave from attempting infinite recursion. The default |
|
|
458 value is 256. |
|
|
459 |
|
3174
|
460 * Octave now uses kpathsea 3.2. |
|
3125
|
461 |
|
2930
|
462 * New configure option, --enable-readline. |
|
|
463 |
|
3035
|
464 * New configure option, --enable-static. |
|
|
465 |
|
|
466 Summary of changes for version 2.0.7: |
|
|
467 ------------------------------------ |
|
|
468 |
|
|
469 This is a bug-fixing release. There are no new user-visible features. |
|
|
470 |
|
|
471 Summary of changes for version 2.0.6: |
|
|
472 ------------------------------------ |
|
|
473 |
|
|
474 This is primarily a bug-fixing release. There are only a few new |
|
|
475 user-visible features. |
|
|
476 |
|
|
477 * The new built-in variable default_eval_print_flag controls whether |
|
|
478 Octave prints the results of commands executed by eval() that do |
|
|
479 not end with semicolons. The default is 1. |
|
|
480 |
|
|
481 * The new built-in constant OCTAVE_HOME specifies the top-level |
|
|
482 directory where Octave is installed. |
|
|
483 |
|
|
484 * Octave no longer includes functions to work with NPSOL or QPSOL, |
|
|
485 because they are not free software. |
|
|
486 |
|
3174
|
487 * The new built-in variable called kluge_procbuf_delay specifies the |
|
|
488 number of microseconds to delay in the parent process after |
|
|
489 forking. By default on gnu-win32 systems, it's set to 500000 (1/2 |
|
|
490 second). On other systems, the default value is 0. Delaying for |
|
|
491 a short time in the parent after forking seems to avoid problems |
|
|
492 in which communicating with subprocesses via pipes would sometimes |
|
|
493 cause Octave to hang. I doubt that the delay is really the right |
|
|
494 solution. If anyone has a better idea, I'd love to hear it. |
|
|
495 |
|
2745
|
496 Summary of changes for version 2.0.5: |
|
|
497 ------------------------------------ |
|
|
498 |
|
2767
|
499 * A `switch' statement is now available. See the Statements chapter |
|
|
500 in the manual for details. |
|
|
501 |
|
2745
|
502 * Commands like ls, save, and cd may now also be used as formal |
|
|
503 parameters for functions. |
|
|
504 |
|
|
505 * More tests. |
|
|
506 |
|
2702
|
507 Summary of changes for version 2.0.4: |
|
|
508 ------------------------------------ |
|
|
509 |
|
|
510 * It is now possible to use commands like ls, save, and cd as simple |
|
|
511 variable names. They still cannot be used as formal parameters |
|
|
512 for functions, or as the names of structure variables. Failed |
|
|
513 assignments leave them undefined (you can recover the orginal |
|
2704
|
514 function definition using clear). |
|
|
515 |
|
|
516 * Is is now possible to invoke commands like ls, save, and cd as |
|
|
517 normal functions (for example, load ("foo", "x", "y", "z")). |
|
2702
|
518 |
|
2666
|
519 Summary of changes for version 2.0.3: |
|
|
520 ------------------------------------ |
|
|
521 |
|
|
522 * The manual has been completely revised and now corresponds much |
|
|
523 more closely to the features of the current version. |
|
|
524 |
|
|
525 * The return value for assignment expressions is now the RHS since |
|
|
526 that is more consistent with the way other programming languages |
|
|
527 work. However, Octave still prints the entire LHS value so that |
|
|
528 |
|
|
529 x = zeros (1, 2); |
|
|
530 x(2) = 1 |
|
|
531 |
|
|
532 still prints |
|
|
533 |
|
|
534 x = |
|
|
535 |
|
|
536 0 1 |
|
|
537 |
|
|
538 but an assignment like |
|
|
539 |
|
|
540 z = x(2) = 1 |
|
|
541 |
|
|
542 sets z to 1 (not [ 0, 1 ] as in previous versions of Octave). |
|
|
543 |
|
2683
|
544 * It is now much easier to make binary distributions. See the |
|
|
545 Binary Distributions section of the manual for more details. |
|
|
546 |
|
2615
|
547 Summary of changes for version 2.0.2: |
|
2613
|
548 ------------------------------------ |
|
|
549 |
|
2621
|
550 * Octave now stops executing commands from a script file if an error |
|
|
551 is encountered. |
|
|
552 |
|
|
553 * The return, and break commands now cause Octave to quit executing |
|
|
554 commands from script files. When used in invalid contexts, the |
|
|
555 break, continue, and return commands are now simply ignored |
|
|
556 instead of producing parse errors. |
|
|
557 |
|
2613
|
558 * size ("") is now [0, 0]. |
|
|
559 |
|
2634
|
560 * New functions: |
|
|
561 |
|
|
562 sleep -- pause execution for a specified number of seconds |
|
|
563 usleep -- pause execution for a specified number of microseconds |
|
|
564 |
|
2452
|
565 Summary of changes for version 2.0: |
|
|
566 ---------------------------------- |
|
|
567 |
|
2520
|
568 * The set and show commands for setting and displaying gnuplot |
|
|
569 parameters have been replaced by gset and gshow. This change will |
|
|
570 probably break lots of things, but it is necessary to allow for |
|
|
571 compatibility with the Matlab graphics and GUI commands in a |
|
|
572 future version of Octave. (For now, the old set and show commands |
|
|
573 do work, but they print an annoying warning message to try to get |
|
|
574 people to switch to using gset.) |
|
|
575 |
|
2581
|
576 * Octave has been mostly ported to Windows NT and Windows 95 using |
|
|
577 the beta 17 release of the Cygnus GNU-WIN32 tools. Not everything |
|
|
578 works, but it is usable. See the file README.WINDOWS for more |
|
|
579 information. |
|
|
580 |
|
2580
|
581 * Dynamic linking works on more systems using dlopen() and friends |
|
|
582 (most modern Unix systems) or shl_load() and friends (HP/UX |
|
|
583 systems). A simple example is provided in examples/hello.cc. |
|
|
584 For this feature to work, you must configure Octave with |
|
|
585 --enable-shared. You may also need to have a shared-library |
|
|
586 version of libg++ and libstdc++. |
|
|
587 |
|
2452
|
588 * New data types can be added to Octave by writing a C++ class. On |
|
|
589 systems that support dynamic linking, new data types can be added |
|
|
590 to an already running Octave binary. A simple example appears in |
|
|
591 the file examples/make_int.cc. Other examples are the standard |
|
|
592 Octave data types defined in the files src/ov*.{h,cc} and |
|
2580
|
593 src/op-*.cc. |
|
2452
|
594 |
|
|
595 * The configure option --enable-bounds-check turns on bounds |
|
|
596 checking on element references for Octave's internal array and |
|
|
597 matrix classes. It's enabled by default. To disable this |
|
|
598 feature, configure Octave with --disable-bounds-check. |
|
|
599 |
|
|
600 * The C-style I/O functions (fopen, fprintf, etc.) have been |
|
|
601 rewritten to be more compatible with Matlab. The fputs function |
|
|
602 has also been added. Usage of the *printf functions that was |
|
|
603 allowed in previous versions of Octave should still work. |
|
|
604 However, there is no way to make the new versions of the *scanf |
|
|
605 functions compatible with Matlab *and* previous versions of |
|
|
606 Octave. An optional argument to the *scanf functions is now |
|
|
607 available to make them behave in a way that is compatible with |
|
|
608 previous versions of Octave. |
|
|
609 |
|
2511
|
610 * Octave can now read files that contain columns of numbers only, |
|
|
611 with no header information. The name of the loaded variable is |
|
|
612 constructed from the file name. Each line in the file must have |
|
|
613 the same number of elements. |
|
|
614 |
|
2452
|
615 * The interface to the pager has changed. The new built-in variable |
|
|
616 `page_output_immediately' controls when Octave sends output to the |
|
|
617 pager. If it is nonzero, Octave sends output to the pager as soon |
|
|
618 as it is available. Otherwise, Octave buffers its output and |
|
|
619 waits until just before the prompt is printed to flush it to the |
|
|
620 pager. |
|
|
621 |
|
|
622 * Expressions of the form |
|
|
623 |
|
|
624 A(i,j) = x |
|
|
625 |
|
|
626 where X is a scalar and the indices i and j define a matrix of |
|
|
627 elements now work as you would expect rather than giving an error. |
|
|
628 I am told that this is how Matlab 5.0 will behave when it is |
|
|
629 released. |
|
|
630 |
|
|
631 * Indexing of character strings now works. |
|
|
632 |
|
|
633 * The echo command has been implemented. |
|
|
634 |
|
|
635 * The document command is now a regular function. |
|
|
636 |
|
|
637 * New method for handling errors: |
|
|
638 |
|
|
639 try |
|
|
640 BODY |
|
|
641 catch |
|
|
642 CLEANUP |
|
|
643 end_try_catch |
|
|
644 |
|
|
645 Where BODY and CLEANUP are both optional and may contain any |
|
|
646 Octave expressions or commands. The statements in CLEANUP are |
|
|
647 only executed if an error occurs in BODY. |
|
|
648 |
|
|
649 No warnings or error messages are printed while BODY is |
|
|
650 executing. If an error does occur during the execution of BODY, |
|
|
651 CLEANUP can access the text of the message that would have been |
|
|
652 printed in the builtin constant __error_text__. This is the same |
|
|
653 as eval (TRY, CATCH) (which may now also use __error_text__) but |
|
|
654 it is more efficient since the commands do not need to be parsed |
|
|
655 each time the TRY and CATCH statements are evaluated. |
|
|
656 |
|
|
657 * Octave no longer parses the help command by grabbing everything |
|
|
658 after the keyword `help' until a newline character is read. To |
|
|
659 get help for `;' or `,', now, you need to use the command |
|
|
660 `help semicolon' or `help comma'. |
|
|
661 |
|
|
662 * Octave's parser now does some simple constant folding. This means |
|
|
663 that expressions like 3*i are now evaluated only once, when a |
|
|
664 function is compiled, and the right hand side of expressions like |
|
|
665 a = [1,2;3,4] are treated as true matrix constants rather than |
|
|
666 lists of elements which must be evaluated each time they are |
|
|
667 needed. |
|
|
668 |
|
|
669 * Built-in variables that can take values of "true" and "false" can |
|
|
670 now also be set to any nonzero scalar value to indicate "true", |
|
|
671 and 0 to indicate "false". |
|
|
672 |
|
|
673 * New built-in variables `history_file', `history_size', and |
|
|
674 `saving_history'. |
|
|
675 |
|
|
676 * New built-in variable `string_fill_char' specifies the character |
|
|
677 to fill with when creating arrays of strings. |
|
|
678 |
|
|
679 * If the new built-in variable `gnuplot_has_frames' is nonzero, |
|
|
680 Octave assumes that your copy of gnuplot includes support for |
|
|
681 multiple plot windows when using X11. |
|
|
682 |
|
|
683 If the new built-in variable `gnuplot_has_multiplot' is nonzero, |
|
|
684 Octave assumes that your copy of gnuplot has the multiplot support |
|
|
685 that is included in recent 3.6beta releases. |
|
|
686 |
|
|
687 The initial values of these variables are determined by configure, |
|
|
688 but can be changed in your startup script or at the command line |
|
|
689 in case configure got it wrong, or if you upgrade your gnuplot |
|
|
690 installation. |
|
|
691 |
|
|
692 * The new plot function `figure' allows multiple plot windows when |
|
|
693 using newer versions of gnuplot with X11. |
|
|
694 |
|
|
695 * Octave now notices when the plotter has exited unexpectedly. |
|
|
696 |
|
|
697 * New built-in variable `warn_missing_semicolon'. If nonzero, Octave |
|
|
698 will warn when statements in function definitions don't end in |
|
|
699 semicolons. The default value is 0. |
|
|
700 |
|
|
701 * Octave now attempts to continue after floating point exceptions |
|
|
702 or out-of-memory errors. |
|
|
703 |
|
|
704 * If Octave crashes, it now attempts to save all user-defined |
|
|
705 variables in a file named `octave-core' in the current directory |
|
|
706 before exiting. |
|
|
707 |
|
|
708 * It is now possible to get the values of individual option settings |
|
|
709 for the dassl, fsolve, lsode, npsol, qpsol, and quad functions |
|
|
710 using commands like |
|
|
711 |
|
|
712 dassl_reltol = dassl_options ("relative tolerance"); |
|
|
713 |
|
|
714 * The svd() function no longer computes the left and right singular |
|
|
715 matrices unnecessarily. This can significantly improve |
|
|
716 performance for large matrices if you are just looking for the |
|
|
717 singular values. |
|
|
718 |
|
|
719 * The filter() function is now a built-in function. |
|
|
720 |
|
|
721 * New function randn() returns a pseudo-random number from a normal |
|
|
722 distribution. The rand() and randn() functions have separate |
|
|
723 seeds and generators. |
|
|
724 |
|
|
725 * Octave's command-line arguments are now available in the built-in |
|
|
726 variable `argv'. The program name is also available in the |
|
|
727 variables `program_invocation_name' and `program_name'. If |
|
|
728 executing a script from the command line (e.g., octave foo.m) or |
|
|
729 using the `#! /bin/octave' hack, the program name is set to the |
|
|
730 name of the script. |
|
|
731 |
|
|
732 * New built-in variable `completion_append_char' used as the |
|
|
733 character to append to successful command-line completion |
|
|
734 attempts. The default is " " (a single space). |
|
|
735 |
|
|
736 * Octave now uses a modified copy of the readline library from |
|
|
737 version 1.14.5 of GNU bash. |
|
|
738 |
|
|
739 * In prompt strings, `\H' expands to the whole host name. |
|
|
740 |
|
|
741 * New built-in variable `beep_on_error'. If nonzero, Octave will try |
|
|
742 to ring your terminal's bell before printing an error message. |
|
|
743 The default value is 0. |
|
|
744 |
|
2554
|
745 * For functions defined from files, the type command now prints the |
|
|
746 text of the file. You can still get the text reconstructed from |
|
|
747 the parse tree by using the new option -t (-transformed). |
|
|
748 |
|
2452
|
749 * New command-line argument --traditional sets the following |
|
|
750 preference variables for compatibility with Matlab: |
|
|
751 |
|
|
752 PS1 = ">> " |
|
|
753 PS2 = "" |
|
|
754 beep_on_error = 1 |
|
|
755 default_save_format = "mat-binary" |
|
|
756 define_all_return_values = 1 |
|
|
757 do_fortran_indexing = 1 |
|
|
758 empty_list_elements_ok = 1 |
|
|
759 implicit_str_to_num_ok = 1 |
|
|
760 ok_to_lose_imaginary_part = 1 |
|
|
761 page_screen_output = 0 |
|
|
762 prefer_column_vectors = 0 |
|
|
763 prefer_zero_one_indexing = 1 |
|
|
764 print_empty_dimensions = 0 |
|
|
765 treat_neg_dim_as_zero = 1 |
|
|
766 warn_function_name_clash = 0 |
|
|
767 whitespace_in_literal_matrix = "traditional" |
|
|
768 |
|
|
769 * New functions: |
|
|
770 |
|
|
771 readdir -- returns names of files in directory as array of strings |
|
|
772 mkdir -- create a directory |
|
|
773 rmdir -- remove a directory |
|
|
774 rename -- rename a file |
|
|
775 unlink -- delete a file |
|
|
776 umask -- set permission mask for file creation |
|
|
777 stat -- get information about a file |
|
|
778 lstat -- get information about a symbolic link |
|
2496
|
779 glob -- perform filename globbing |
|
|
780 fnmatch -- match strings with filename globbing patterns |
|
2452
|
781 more -- turn the pager on or off |
|
|
782 gammaln -- alias for lgamma |
|
|
783 |
|
|
784 * New audio functions from Andreas Weingessel |
|
|
785 <Andreas.Weingessel@ci.tuwien.ac.at>. |
|
|
786 |
|
2458
|
787 lin2mu -- linear to mu-law encoding |
|
|
788 loadaudio -- load an audio file to a vector |
|
|
789 mu2lin -- mu-law to linear encoding |
|
|
790 playaudio -- play an audio file |
|
|
791 record -- record sound and store in vector |
|
|
792 saveaudio -- save a vector as an audio file |
|
|
793 setaudio -- executes mixer shell command |
|
2452
|
794 |
|
|
795 * New plotting functions from Vinayak Dutt. Ones dealing with |
|
|
796 multiple plots on one page require features from gnuplot 3.6beta |
|
|
797 (or later). |
|
|
798 |
|
|
799 bottom_title -- put title at the bottom of the plot |
|
|
800 mplot -- multiplot version of plot |
|
|
801 multiplot -- switch multiple-plot mode on or off |
|
|
802 oneplot -- return to one plot per page |
|
|
803 plot_border -- put a border around plots |
|
|
804 subplot -- position multiple plots on a single page |
|
|
805 subwindow -- set subwindow position for next plot |
|
|
806 top_title -- put title at the top of the plot |
|
|
807 zlabel -- put a label on the z-axis |
|
|
808 |
|
|
809 * New string functions |
|
|
810 |
|
|
811 bin2dec -- convert a string of ones and zeros to an integer |
|
|
812 blanks -- create a string of blanks |
|
|
813 deblank -- delete trailing blanks |
|
|
814 dec2bin -- convert an integer to a string of ones and zeros |
|
|
815 dec2hex -- convert an integer to a hexadecimal string |
|
|
816 findstr -- locate occurrences of one string in another |
|
|
817 hex2dec -- convert a hexadecimal string to an integer |
|
|
818 index -- return position of first occurrence a string in another |
|
|
819 rindex -- return position of last occurrence a string in another |
|
|
820 split -- divide one string into pieces separated by another |
|
|
821 str2mat -- create a string matrix from a list of strings |
|
|
822 strrep -- replace substrings in a string |
|
|
823 substr -- extract a substring |
|
|
824 |
|
|
825 The following functions return a matrix of ones and zeros. |
|
|
826 Elements that are nonzero indicate that the condition was true for |
|
|
827 the corresponding character in the string array. |
|
|
828 |
|
|
829 isalnum -- letter or a digit |
|
|
830 isalpha -- letter |
|
|
831 isascii -- ascii |
|
|
832 iscntrl -- control character |
|
|
833 isdigit -- digit |
|
|
834 isgraph -- printable (but not space character) |
|
|
835 islower -- lower case |
|
|
836 isprint -- printable (including space character) |
|
|
837 ispunct -- punctuation |
|
|
838 isspace -- whitespace |
|
|
839 isupper -- upper case |
|
|
840 isxdigit -- hexadecimal digit |
|
|
841 |
|
|
842 These functions return new strings. |
|
|
843 |
|
2458
|
844 tolower -- convert to lower case |
|
|
845 toupper -- convert to upper case |
|
2452
|
846 |
|
|
847 * New function, fgetl. Both fgetl and fgets accept an optional |
|
|
848 second argument that specifies a maximum number of characters to |
|
|
849 read, and the function fgets is now compatible with Matlab. |
|
|
850 |
|
|
851 * Printing in hexadecimal format now works (format hex). It is also |
|
|
852 possible to print the internal bit representation of a value |
|
|
853 (format bit). Note that these formats are only implemented for |
|
|
854 numeric values. |
|
|
855 |
|
|
856 * Additional structure features: |
|
|
857 |
|
|
858 -- Name completion now works for structures. |
|
|
859 |
|
|
860 -- Values and names of structure elements are now printed by |
|
|
861 default. The new built-in variable `struct_levels_to_print' |
|
|
862 controls the depth of nested structures to print. The default |
|
|
863 value is 2. |
|
|
864 |
|
|
865 -- New functions: |
|
|
866 |
|
|
867 struct_contains (S, NAME) -- returns 1 if S is a structure with |
|
|
868 element NAME; otherwise returns 0. |
|
|
869 |
|
|
870 struct_elements (S) -- returns the names of all elements |
|
|
871 of structure S in an array of strings. |
|
|
872 |
|
|
873 * New io/subprocess functions: |
|
|
874 |
|
2458
|
875 fputs -- write a string to a file with no formatting |
|
|
876 popen2 -- start a subprocess with 2-way communication |
|
|
877 mkfifo -- create a FIFO special file |
|
|
878 popen -- open a pipe to a subprocess |
|
|
879 pclose -- close a pipe from a subprocess |
|
|
880 waitpid -- check the status of or wait for subprocesses |
|
2452
|
881 |
|
|
882 * New time functions: |
|
|
883 |
|
2458
|
884 asctime -- format time structure according to local format |
|
|
885 ctime -- equivalent to `asctime (localtime (TMSTRUCT))' |
|
|
886 gmtime -- return time structure corresponding to UTC |
|
|
887 localtime -- return time structure corresponding to local time zone |
|
|
888 strftime -- print given time structure using specified format |
|
|
889 time -- return current time |
|
2452
|
890 |
|
|
891 The `clock' and `date' functions are now implemented in M-files |
|
|
892 using these basic functions. |
|
|
893 |
|
|
894 * Access to additional Unix system calls: |
|
|
895 |
|
|
896 dup2 -- duplicate a file descriptor |
|
|
897 exec -- replace current process with a new process |
|
|
898 fcntl -- control open file descriptors |
|
|
899 fork -- create a copy of the current process |
|
|
900 getpgrp -- return the process group id of the current process |
|
|
901 getpid -- return the process id of the current process |
|
|
902 getppid -- return the process id of the parent process |
|
2475
|
903 getuid -- return the real user id of the current process |
|
|
904 getgid -- return the real group id of the current process |
|
|
905 geteuid -- return the effective user id of the current process |
|
|
906 getegid -- return the effective group id of the current process |
|
2452
|
907 pipe -- create an interprocess channel |
|
|
908 |
|
|
909 * Other new functions: |
|
|
910 |
|
2554
|
911 commutation_matrix -- compute special matrix form |
|
|
912 duplication_matrix -- compute special matrix form |
|
|
913 common_size.m -- bring arguments to a common size |
|
|
914 completion_matches -- perform command completion on string |
|
2458
|
915 tilde_expand -- perform tilde expansion on string |
|
2554
|
916 |
|
|
917 meshgrid -- compatible with Matlab's meshgrid function |
|
|
918 tmpnam -- replaces octave_tmp_file_name |
|
|
919 atexit -- register functions to be called when Octave exits |
|
|
920 putenv -- define an environment variable |
|
|
921 bincoeff -- compute binomial coefficients |
|
|
922 nextpow2 -- compute the next power of 2 greater than a number |
|
|
923 detrend -- remove a best fit polynomial from data |
|
|
924 erfinv -- inverse error function |
|
|
925 shift -- perform a circular shift on the elements of a matrix |
|
|
926 pow2 -- compute 2 .^ x |
|
|
927 log2 -- compute base 2 logarithms |
|
|
928 diff -- compute differences of matrix elements |
|
|
929 vech -- stack columns of a matrix below the diagonal |
|
|
930 vec -- stack columns of a matrix to form a vector |
|
|
931 xor -- compute exclusive or |
|
2452
|
932 |
|
2459
|
933 * Functions for getting info from the password database on Unix systems: |
|
|
934 |
|
|
935 getpwent -- read entry from password-file stream, opening if necessary |
|
|
936 getpwuid -- search for password entry with matching user ID |
|
|
937 getpwnam -- search for password entry with matching username |
|
|
938 setpwent -- rewind the password-file stream |
|
|
939 endpwent -- close the password-file stream |
|
|
940 |
|
2484
|
941 * Functions for getting info from the group database on Unix systems: |
|
|
942 |
|
|
943 getgrent -- read entry from group-file stream, opening if necessary |
|
|
944 getgrgid -- search for group entry with matching group ID |
|
|
945 getgrnam -- search for group entry with matching group name |
|
|
946 setgrent -- rewind the pgroup-file stream |
|
|
947 endgrent -- close the group-file stream |
|
|
948 |
|
2452
|
949 * The New function octave_config_info returns a structure containing |
|
|
950 information about how Octave was configured and compiled. |
|
|
951 |
|
|
952 * New function getrusage returns a structure containing system |
|
|
953 resource usage statistics. The `cputime' function is now defined |
|
|
954 in an M-file using getrusage. |
|
|
955 |
|
|
956 * The info reader is now a separate binary that runs as a |
|
|
957 subprocess. You still need the info reader distributed with |
|
|
958 Octave though, because there are some new command-line arguments |
|
|
959 that are not yet available in the public release of Info. |
|
|
960 |
|
|
961 * There is a new built-in variable, INFO_PROGRAM, which is used as |
|
|
962 the name of the info program to run. Its initial value is |
|
|
963 $OCTAVE_HOME/lib/octave/VERSION/exec/ARCH/info, but that value can |
|
|
964 be overridden by the environment variable OCTAVE_INFO_PROGRAM, or |
|
|
965 the command line argument --info-program NAME, or by setting the |
|
|
966 value of INFO_PROGRAM in a startup script. |
|
|
967 |
|
|
968 * There is a new built-in variable, EXEC_PATH, which is used as |
|
|
969 the list of directories to search when executing subprograms. Its |
|
|
970 initial value is taken from the environment variable |
|
|
971 OCTAVE_EXEC_PATH (if it exists) or PATH, but that value can be |
|
|
972 overridden by the the command line argument --exec-path PATH, or |
|
|
973 by setting the value of EXEC_PATH in a startup script. If the |
|
|
974 EXEC_PATH begins (ends) with a colon, the directories |
|
|
975 $OCTAVE_HOME/lib/octave/VERSION/exec/ARCH and $OCTAVE_HOME/bin are |
|
|
976 prepended (appended) to EXEC_PATH (if you don't specify a value |
|
|
977 for EXEC_PATH explicitly, these special directories are prepended |
|
|
978 to your PATH). |
|
|
979 |
|
|
980 * If it is present, Octave will now use an `ls-R' database file to |
|
|
981 speed up recursive path searching. Octave looks for a file called |
|
|
982 ls-R in the directory specified by the environment variable |
|
|
983 OCTAVE_DB_DIR. If that is not set but the environment variable |
|
|
984 OCTAVE_HOME is set, Octave looks in $OCTAVE_HOME/lib/octave. |
|
|
985 Otherwise, Octave looks in the directory $datadir/octave (normally |
|
|
986 /usr/local/lib/octave). |
|
|
987 |
|
|
988 * New examples directory. |
|
|
989 |
|
|
990 * There is a new script, mkoctfile, that can be used to create .oct |
|
|
991 files suitable for dynamic linking. |
|
|
992 |
|
|
993 * Many more bug fixes. |
|
|
994 |
|
|
995 * ChangeLogs are now kept in each subdirectory. |
|
|
996 |
|
|
997 See NEWS.1 for old news. |
