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1 Octave PROJECTS -*- text -*- |
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2 =============== |
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3 |
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4 Check with bug-octave@bevo.che.wisc.edu for a possibly more current |
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5 copy. Also, if you start working steadily on a project, please let |
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6 bug-octave@bevo.che.wisc.edu know. We might have information that |
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7 could help you; we'd also like to send you the GNU coding standards. |
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8 |
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9 This list is not exclusive -- there are many other things that might |
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10 be good projects, but it might instead be something we already have, |
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11 so check with bug-octave@bevo.che.wisc.edu before you start. |
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12 |
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13 --------- |
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14 Numerical: |
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15 --------- |
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16 |
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17 * Merge control stuff. |
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18 |
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19 * Improve logm, and sqrtm. |
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20 |
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21 * Improve complex mapper functions. |
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22 |
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23 * Make functions like gamma() return the right IEEE Inf or NaN |
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24 values for extreme args or other undefined cases. |
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25 |
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26 * Handle complex values in fread and fwrite. |
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27 |
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28 * Support for lp_solve for linear programming problems. |
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29 |
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30 * Free QP solver. |
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31 |
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32 * Free NLP solver. |
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33 |
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34 * Support for sparse matrices. |
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35 |
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36 * Fix CollocWt to handle Laguerre polynomials. Make it easy to |
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37 extend it to other polynomial types. |
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38 |
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39 * Add optional arguments to colloc so that it's not restricted to |
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40 Legendre polynomials. |
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41 |
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42 * Fix eig to also be able to solve the generalized eigenvalue |
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43 problem, and to solve for eigenvalues and eigenvectors without |
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44 performing a balancing step first. |
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45 |
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46 * Move rand, eye, xpow, xdiv, etc., functions to the matrix classes. |
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47 |
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48 * Use octave_allocator for memory management in Array classes once |
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49 g++ supports static member templates. |
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50 |
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51 * Implement the following functions: |
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52 -- ppval -- cross -- dot |
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53 |
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54 * Allow user-supplied gradient information to be passed to NPSOL. |
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55 |
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56 * Actually allow control of the derivative level in NPSOL. It can |
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57 be changed with npsol_options(), but then NPSOL::do_minimize() |
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58 sets it based on whether gradient and jacobian functions are |
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59 available. |
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60 |
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61 * When constructing NLConst (and other) objects, make sure that |
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62 there are sufficient checks to ensure that the dimensions all |
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63 conform. |
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64 |
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65 * Support for FSQP. |
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66 |
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67 * Convert FSQP style NLP statement to NPSOL style. |
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68 |
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69 * Convert NPSOL style NLP statement to FSQP style. |
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70 - Look for linear equality constraints, extract corresponding rows |
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71 of C. The rest are inequality constraints. |
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72 - Look for Nonlinear equality constraints and set up a vector of |
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73 pointers for shuffling. |
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74 - Transform lb <= C*x <= ub, lb != ub, to C*x - ub <= 0 and |
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75 lb - C*x <= 0. Likewise for lb <= g(x) <= ub. |
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76 - Call FSQP. |
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77 |
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78 * Optional inputs for fsqp. |
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79 |
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80 * Allow parameters to be passed through the call to fsolve() to the |
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81 user-supplied function for Matlab compatibility. Don't place an |
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82 upper limit on the number of arguments. |
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83 |
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84 * Check matrix classes for proper handling of empty matrices. |
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85 |
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86 * Force all empty matrices to be 0x0 even when other dimensions have |
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87 been speicified, for compatibility with Matlab, at least when some |
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88 preference variable is set. |
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89 |
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90 * Make operations with empty matrices produce empty matrices, for |
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91 compatibility with Matlab (but only if Matlab 5 still does things |
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92 this way). For example: [1, 2] * [] ==> []. |
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93 |
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94 * Should any ([]) return [] or 0? What about all ([])? |
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95 |
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96 * Improve design of ODE, DAE, classes. |
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97 |
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98 * Make it possible to specify a time which dassl and lsode should |
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99 not integrate past. |
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100 |
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101 * Add interface to daspk (new version of dassl). |
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102 |
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103 * Extend meaning of .* to include v .* M or M .* v (where v is a |
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104 column vector with the same number of rows as M) to scale rows of |
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105 M by elements of v. Similarly, if w is a row vector with as many |
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106 columns as M, then either w .* M or M .* w scales the columns of |
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107 M. |
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108 |
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109 * Add support for +=, -=, etc. |
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110 |
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111 * Given two vectors x and y of length m and n, implement a function |
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112 outer (x, y, f) that returns an m-by-n matrix with entries |
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113 f (x(i), y(j)). If f is omitted, multiplication is the default. |
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114 Should probably work for any vectors, not just if x is a column |
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115 vector and y is a row vector. |
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116 |
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117 * Make it possible to solve b = L \ x efficiently, either by |
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118 providing an explicit function call, or by automatically |
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119 determining that L is triangular. If it is done automatically, |
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120 provide some means for determining whether Octave has actually |
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121 detected that the matrix is triangular. |
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122 |
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123 * The polyfit function uses the economy QR factorization, but even |
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124 that can take a lot of time for large datasets. Consider an |
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125 option to compute the result with inv (A' * A) * A' * y or some |
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126 other faster method.d Possibly just switch to this method if the |
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127 dataset is larger than some value. |
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128 |
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129 * Consider making the behavior of the / and \ operators for |
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130 non-square systems compatible with Matlab. |
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131 |
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132 -------- |
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133 Graphics: |
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134 -------- |
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135 |
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136 * Make plotting with plplot work. |
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137 |
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138 * Fix interface with gnuplot to wait for gnuplot to output any text |
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139 before octave returns a prompt. Possible by implementing two |
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140 way communication between gnuplot and Octave. |
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141 |
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142 * Make gsave (and possibly gload) work. Implement gsave by having it |
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143 also alter the plot command to not use temporary files (perhaps |
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144 with some user-specified template for naming them) and then |
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145 sending a `save' command to gnuplot. |
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146 |
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147 * It would be nice to be able to check that a plot is currently |
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148 being displayed. |
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149 |
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150 * Implement clf, gcf, get, set, orient, print, close, etc. in |
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151 Matlab-compatible ways. |
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152 |
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153 * Make it possible to check the current graphics terminal type. |
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154 |
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155 * If possible, pass data to gnuplot without using temporary files. |
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156 |
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157 * If using temporary files, delete them when gnuplot exits. |
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158 |
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159 * If possible, pass binary data to gnuplot to speed things up. |
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160 |
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161 * If using gnuplot, consider setting a smaller default for the |
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162 `zero' value (e.g., set zero sqrt (realmin) or something). |
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163 |
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164 ------- |
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165 Strings: |
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166 ------- |
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167 |
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168 * Improve performance of string functions, particularly for |
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169 searching and replacing. |
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170 |
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171 * Provide some regex matching functions. |
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172 |
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173 * Convert string functions to work on string arrays. |
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174 |
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175 * Make find work for strings. |
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176 |
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177 * Consider making octave_print_internal() print some sort of text |
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178 representation for unprintable characters instead of sending them |
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179 directly to the terminal. (But don't do this for fprintf!) |
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180 |
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181 * Consider changing the default value of `string_fill_char' from SPC |
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182 to NUL. |
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183 |
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184 * Consider making ["test", []] ==> "test", for compatibility with |
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185 Matlab, at least when some set of preferences are set. |
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186 |
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187 ---------------- |
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188 Other Data Types: |
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189 ---------------- |
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190 |
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191 * New types (char, short, etc.). |
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192 |
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193 * 3d matrix stuff. |
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194 |
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195 * Template functions for mixed-type ops. |
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196 |
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197 * Stuff for arithmetic using charMatrix, intMatrix, etc. |
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198 |
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199 ------------------------ |
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200 Graphical User Interface: |
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201 ------------------------ |
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202 |
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203 * In an X11 or other windowing environment, allow the user to pop up |
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204 windows for menus and other purposes. A good place to start might |
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205 be Tk, as long as Tcl is avoided. |
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206 |
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207 * Add a way to handle events, like alarms, mouse clicks, etc. |
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208 |
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209 ------------ |
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210 Input/Output: |
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211 ------------ |
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212 |
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213 * Make fread and fwrite work for complex data. Iostreams based |
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214 versions of these functions would also be nice, and if you are |
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215 working on them, it would be good to support other size |
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216 specifications (integer*2, etc.). |
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217 |
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218 * Make load and save work for structures. |
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219 |
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220 * Make load and save look for <file>.mat if only given <file>. |
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221 |
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222 Potential sticky points: |
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223 |
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224 - For load, if both foo and foo.mat exist, should it prefer foo |
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225 or foo.mat? Should the preference depend on the arguments to |
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226 load? I think it should only prefer .mat files if the |
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227 -mat-binary option is supplied, or if the file foo.mat exists |
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228 but the file foo does not. |
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229 |
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230 - For save, should it prefer to create foo or foo.mat? Should |
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231 the preference depend on the arguments to save? Should the |
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232 default_save_format imply a default preference? I think it |
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233 should only create .mat files if it is writing Matlab |
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234 compatible files. |
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235 |
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236 * Move some pr-output stuff to liboctave. |
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237 |
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238 * Make the cutoff point for changing to packed storage a |
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239 user-preference variable with default value 8192. |
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240 |
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241 * Save image data in binary format to save space. |
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242 |
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243 * Make it possible to load other image formats (ppm, pbm, etc. would |
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244 probably be best since there are already filters to convert to |
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245 these formats from others.) |
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246 |
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247 * Use HDF for binary data. |
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248 |
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249 * Make ascii load and save work for Inf and NaN. (This is really a |
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250 problem with the functions for reading floats in the GNU iolib.) |
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251 |
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252 * Complain if there is not enough disk space available (I think |
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253 there is simply not enough error checking in the code that handles |
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254 writing data). |
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255 |
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256 * Make it possible to tie arbitrary input and output streams |
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257 together, similar to the way iostreams can be tied together. |
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258 |
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259 ----------- |
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260 Interpreter: |
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261 ----------- |
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262 |
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263 * Fix the parser so that |
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264 |
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265 function foo () |
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266 implicit_str_to_num_ok = 1; |
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267 '#' + 0; |
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268 endfunction |
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269 |
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270 succeeds, even when implicit_str_to_num_ok is 0 at the time the |
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271 function is parsed. |
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272 |
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273 * Consider making x(:) work no matter what the value of |
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274 do_fortran_indexing. |
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275 |
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276 * If foo.oct and foo.m both exist in the LOADPATH, Octave will |
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277 always find foo.oct, even if foo.m appears earlier in the list of |
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278 directories. This should be fixed (in the kpathsearch library) to |
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279 find the first .oct or .m file in the path, and only prefer .oct |
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280 over .m if both files are in the same directory. |
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281 |
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282 * Fix the grammar to allow structure references and index operations |
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283 for for anonymous expressions. For example, it should be possible |
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284 to write |
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285 |
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286 localtime (time ()) . hour; |
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287 |
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288 to get the current hour. Likewise, it should be possible to write |
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289 |
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290 svd (A) (1:13); |
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291 |
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292 to extract the first 13 singular values of the matrix A. |
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293 |
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294 * Consider grouping all preference variables in a structure instead |
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295 of further polluting the namespace. Maybe `Octave_options.xxx'? |
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296 |
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297 * Rewrite functions in input.cc to do the right thing in all cases |
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298 of using readline, forced interactive behavior, echoing of input, |
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299 etc. |
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300 |
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301 * Make it possible to redefine built-in variables and functions. |
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302 (Fix whatever it is that is happening with clear for built-in |
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303 variables.) |
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304 |
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305 * Make it possible to check if a variable is complex. |
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306 |
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307 * Consider making linspace() and logspace() return the value |
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308 corresponding to the first argument if the number of requested |
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309 points is 1. |
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310 |
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311 * Make it possible to get the names of the arguments that are passed |
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312 to functions, at least if simple variables are passed. |
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313 |
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314 * Consider allowing an arbitrary property list to be attached to any |
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315 variable. This could be a more general way to handle the help |
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316 string that can currently be added with `document'. |
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317 |
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318 * Allow more command line options to be accessible as built-in |
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319 variables (--echo-commands, etc.). |
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320 |
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321 * Allow `octave -c STRING' to execute commands from STRING then |
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322 exit. |
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323 |
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324 * Handle DOS style CRLFs in M files. This should probably be |
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325 optional. |
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326 |
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327 * Make the interpreter run faster. |
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328 |
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329 * Make it possible to disable or enable all warnings on an |
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330 individual basis from the command line or via some built-in |
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331 structure variable. |
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332 |
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333 * Warn about complex comparisons? Could just use double_value() or |
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334 matrix_value() instead of explicit conversions to real types. |
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335 |
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336 * Make warnings also give some indication about the location of the |
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337 code that triggers the warning. |
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338 |
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339 * Warn about complex comparisons? Could just use double_value() or |
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340 matrix_value() instead of explicit conversions to real types. For |
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341 this to really be useful, some additional information must be |
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342 available to point to the location of the code that triggers the |
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343 warning. |
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344 |
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345 * Consider making it possible to have arrays of structures, and some |
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346 way of indexing them. |
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347 |
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348 * Allow arbitrary lower bounds for array indexing. (Watch out for |
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349 the additional conflict with zero-one style indexing.) |
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350 |
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351 * Recursive problems. |
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352 |
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353 * Improve the way ignore_function_time_stamp works to allow |
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354 selecting by individual directories or functions. Also, |
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355 optionally allow checking only once between each prompt instead of |
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356 every time the function is called. |
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357 |
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358 * Make it possible to ask exist() to only look for certain classes |
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359 of variables, functions, files, etc. rather than always looking for |
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360 everything. |
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361 |
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362 * Add a command-line option to tell Octave to just do syntax |
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363 checking and not execute statements. |
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364 |
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365 * Is it necessary for do_binary_op and do_unary_op to be friends of |
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366 the tree_constant class. |
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367 |
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368 * Clean up symtab and variable stuff. |
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369 |
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370 * Input stream class for parser files -- must manage buffers for |
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371 flex and context for global variable settings. |
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372 |
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373 * Make LEXICAL_ERROR have a value that is the error message for |
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374 parse_error() to print? |
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375 |
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376 * Make it possible to clear dynamically loaded functions. |
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377 |
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378 * Add a run-time alias mechanism that would allow things like |
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379 |
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380 alias fun function_with_a_very_long_name |
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381 |
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382 so that `function_with_a_very_long_name' could be invoked as |
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383 `fun'. |
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384 |
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385 * What should is_global() return when called for built-in variables? |
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386 |
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387 * Allow local changes to variables to be written more compactly than |
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388 is currently possible with unwind_protect. For example, |
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389 |
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390 function f () |
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391 local prefer_column_vectors = something; |
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392 ... |
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393 endfunction |
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394 |
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395 would be equivalent to |
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396 |
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397 function f () |
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398 unwind_protect |
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399 save_prefer_column_vectors = prefer_column_vectors; |
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400 prefer_column_vectors = something; |
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401 ... |
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402 unwind_protect_cleanup |
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403 prefer_column_vectors = save_prefer_column_vectors; |
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404 end_unwind_protect |
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405 endfunction |
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406 |
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407 * Fix all function files to check for bogus inputs (wrong number or |
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408 types of input arguments, wrong number of output arguments). |
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409 |
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410 * Reduce the memory and time required to parse very large matrix |
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411 lists. |
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412 |
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413 * Handle options for built-in functions more consistently. |
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414 |
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415 * Too much time is spent allocating and freeing memory. What can be |
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416 done to improve performance? |
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417 |
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418 * Error output from Fortran code is ugly. Something should be done to |
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419 make it look better. |
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420 |
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421 * It would be nice if output from the Fortran routines could be |
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422 passed through the pager. |
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423 |
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424 * Attempt to recognize common subexpressions in the parser. |
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425 |
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426 * Remove the buffer size limit in octave_read() in input.cc. |
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427 |
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428 * Handle arrays with more than two dimensions. |
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429 |
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430 * Consider making assignment statements like |
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431 |
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432 M (i_idx, j_idx) = RHS |
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433 |
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434 produce the value of RHS instead of the value of M. |
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435 |
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436 * Consider making it possible to specify an empty matrix with a |
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437 syntax like [](e1, e2). Of course at least one of the expressions |
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438 must be zero... |
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439 |
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440 * Eliminate force_numeric and make_numeric functions. |
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441 |
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442 * Is Matrix::fortran_vec() really necessary? |
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443 b |
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444 * print_usage() should set error_state in most cases? |
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445 |
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446 * Make statements like this |
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447 |
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448 foo bar baz |
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449 |
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450 turn into function calls like this: |
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451 |
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452 foo ("bar", "baz") |
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453 |
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454 This is pretty ugly and introduces some conflicts. |
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455 |
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456 * Add a command that works like bash's `builtin' command. |
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457 |
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458 * Handle comments in parse trees for use with the type command. |
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459 |
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460 * Make the type command handle script files too, by just reading and |
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461 printing them. |
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462 |
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463 * Clean up eye, eval, feval, keyboard, input, ones, zeros. |
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464 |
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465 * Turn off printing when evaluating expressions in an eval() |
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466 statement, for compatibility with Matlab. |
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467 |
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2330
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468 * It would be nice to have an interactive debugger. |
|
|
469 |
|
2378
|
470 * Make whos report total memory used by variables (and functions?). |
|
|
471 |
|
2746
|
472 * Rewrite whos and the symbol_record_info class. Write a built-in |
|
|
473 function that gives all the basic information, then write who and |
|
|
474 whos as M-files. |
|
2439
|
475 |
|
2799
|
476 * On systems that support matherr(), make it possible for users to |
|
|
477 enable the printing of warning messages. |
|
|
478 |
|
2330
|
479 ------- |
|
|
480 History: |
|
|
481 ------- |
|
|
482 |
|
|
483 * Add an option to allow saving input from script files in the |
|
|
484 history list. |
|
|
485 |
|
|
486 * Fix history problems -- core dump if multiple processes are |
|
|
487 writing to the same history file? |
|
|
488 |
|
|
489 ------------------------------ |
|
|
490 Configuration and Installation: |
|
|
491 ------------------------------ |
|
|
492 |
|
2473
|
493 * Handle USE_READLINE so that --enable-readline will work. |
|
2330
|
494 |
|
|
495 * Make Octave as independent of the particular readline version as |
|
|
496 possible. |
|
|
497 |
|
2473
|
498 * Add an --enable-pathsearch option to configure to make it possible |
|
|
499 to configure and run without kpathsea. |
|
|
500 |
|
2811
|
501 * Make configure take more defaults from the environment. It should |
|
|
502 definitely pay attention to CFLAGS, CXXFLAGS, FFLAGS, etc. |
|
2469
|
503 |
|
2330
|
504 * Should --enable-lite-kernel imply --enable-shared? |
|
|
505 |
|
|
506 * Make it possible to configure without readline. |
|
|
507 |
|
|
508 * Makefile changes: |
|
|
509 -- eliminate for loops |
|
|
510 -- define shell commands or eliminate them |
|
|
511 -- verify distclean |
|
|
512 -- consolidate targets |
|
|
513 |
|
|
514 * Make it possible to configure so that installed binaries and |
|
|
515 shared libraries are stripped. |
|
|
516 |
|
|
517 * Make installation of the static libraries optional. |
|
|
518 |
|
|
519 ------------------------------ |
|
|
520 Documentation and On-Line Help: |
|
|
521 ------------------------------ |
|
|
522 |
|
|
523 * Document new features. |
|
|
524 -- history-search-{back,for}ward. |
|
|
525 -- try/catch. |
|
|
526 -- Other stuff mentioned in the NEWS file. |
|
|
527 |
|
|
528 * Improve the Texinfo Documentation for the interpreter. It would |
|
|
529 be useful to have lots more examples, to not have so many forward |
|
|
530 references, and to not have very many simple lists of functions. |
|
|
531 |
|
|
532 * The docs should mention something about efficiency and that using |
|
|
533 array operations is almost always a good idea for speed. |
|
|
534 |
|
|
535 * Texinfo documentation for the C++ classes. |
|
|
536 |
|
|
537 * Support multiple info files, perhaps allowing one or more in each |
|
|
538 directory in the LOADPATH, so that local collections of M-files |
|
|
539 could be documented with Info. |
|
|
540 |
|
|
541 * Figure out a good way to have functions and variables documented |
|
|
542 in only one place. |
|
|
543 |
|
|
544 * Improve help messages for operators and keywords in help.cc. |
|
|
545 |
|
|
546 * Make index entries more consistent to improve behavior of `help -i'. |
|
|
547 |
|
|
548 * Make `help -i' try to find a whole word match first. |
|
|
549 |
|
|
550 * Allow help for local additions to be accessible with help -i. |
|
|
551 |
|
|
552 * Make the arrow keys work in the info reader. |
|
|
553 |
|
|
554 * Update Info to be based on the current Texinfo release. |
|
|
555 |
|
2378
|
556 * Should info/terminal.c include definitions for PC, BC, UP, and |
|
|
557 ospeed on all systems? |
|
|
558 |
|
2330
|
559 * Demo files. |
|
|
560 |
|
|
561 * As the number of m-files with octave grows perhaps a 'Contents.m' |
|
|
562 file for each toolbox (directory) would be appropriate so one |
|
|
563 knows exactly what functions are in a toolbox with a quick look. |
|
|
564 It would be best to generate information for each function directly |
|
|
565 from the M-files, so that the information doesn't have to be |
|
|
566 duplicated, and will remain current if the M-files change. It |
|
|
567 would also be best to do as much of this as possible in an M-file, |
|
|
568 though I wouldn't mind adding some basic support for listing the |
|
|
569 names of all the directories in the LOADPATH, and the names of all |
|
|
570 the M-files in a given directory if that is needed. |
|
|
571 |
|
2787
|
572 Also make it possible to recursively search for Contents files: |
|
|
573 |
|
|
574 help dir -- Contents from dir |
|
|
575 help dir// -- Contents from dir and all its subdirectories |
|
|
576 help dir1/dir2 -- Contents from dir2 which is under dir1 |
|
|
577 |
|
2330
|
578 * Some sort of blurb (2-3 pages) describing Octave in a reasonably |
|
|
579 coherent way, where to get it etc., perhaps formatted pretty, |
|
|
580 i.e. not just text. Maybe start with the latest Announce file. |
|
|
581 |
|
|
582 ----- |
|
|
583 Tests: |
|
|
584 ----- |
|
|
585 |
|
|
586 * Improved set of tests: |
|
|
587 |
|
|
588 -- Tests for various functions. Would be nice to have a test file |
|
|
589 corresponding to every function. |
|
|
590 |
|
|
591 -- Tests for element by element operators: |
|
|
592 + - .* ./ .\ .^ | & < <= == >= > != ! |
|
|
593 |
|
|
594 -- Tests for boolean operators: && || |
|
|
595 |
|
|
596 -- Tests for other operators: * / \ ' .' |
|
|
597 |
|
|
598 -- Tests from bug reports. |
|
|
599 |
|
|
600 -- Tests for indexed assignment. Need to consider the following: |
|
|
601 o fortran-style indexing |
|
|
602 o zero-one indexing |
|
|
603 o assignment of empty matrix as well as values |
|
|
604 o resizing |
|
|
605 |
|
|
606 * Tests for all internal functions. |
|
|
607 |
|
|
608 ----------- |
|
|
609 Programming: |
|
|
610 ----------- |
|
|
611 |
|
|
612 * Move toward using more stuff from standard C++ library. |
|
|
613 |
|
|
614 * More C++/Fortran cleanups. |
|
|
615 |
|
|
616 * It is likely that there are still some memory leaks. Hunt then down |
|
|
617 and plug them. |
|
|
618 |
|
2475
|
619 * Better error messages for missing operators? |
|
|
620 |
|
|
621 * Eliminate duplicate enums in pt-exp.cc, pt-const.cc, and ov.cc. |
|
|
622 |
|
|
623 * Handle octave_print_internal() stuff at the liboctave level. Then |
|
|
624 the octave_value classes could just call on the print() methods |
|
|
625 for the underlying classes. |
|
|
626 |
|
|
627 * As much as possible, eliminate explicit checks for the types of |
|
|
628 octave_value objects so that user-defined types will automatically |
|
|
629 do the right thing in more cases. |
|
|
630 |
|
2330
|
631 * Only include config.h in files that actually need it, instead of |
|
|
632 including it in every .cc file. Unfortunately, this might not be |
|
|
633 so easy to figure out. |
|
|
634 |
|
|
635 * GNU coding standards: |
|
|
636 |
|
|
637 -- Add a `Makefile' target to the Makefiles. |
|
|
638 -- Comments on #else and #endif preprocessor commands. |
|
|
639 -- Change error message format to match standards everywhere. |
|
|
640 |
|
|
641 * Use STL stuff instead of libg++ lists, maps, and stacks. |
|
|
642 |
|
|
643 * Eliminate more global variables. |
|
|
644 |
|
|
645 * Encapsulate readline in a class. Include interface to stuff like |
|
|
646 blink_matching_paren. |
|
|
647 |
|
|
648 * Encapsulate resource stuff in a class. |
|
|
649 |
|
|
650 * Move procstream to liboctave. |
|
|
651 |
|
|
652 * Replace more C-style vectors with Array<T> stuff. |
|
|
653 |
|
|
654 * Use references and classes in more places. |
|
|
655 |
|
|
656 * Share more code among the various *_options functions. |
|
|
657 |
|
|
658 ------------- |
|
|
659 Miscellaneous: |
|
|
660 ------------- |
|
|
661 |
|
|
662 * Implement some functions for interprocess communication: bind, |
|
|
663 accept, connect, gethostbyname, etc. |
|
|
664 |
|
2454
|
665 * The installation process should also install octave.el. This |
|
|
666 needs to detect the appropriate Emacs binary to use to |
|
|
667 byte-compile the .el file. Following GNU Emacs philosophy, |
|
|
668 installation would be into $(prefix)/share/emacs/site-lisp by |
|
|
669 default, but it should be selectable. |
|
|
670 |
|
2330
|
671 * The ability to transparently handle very large files: |
|
|
672 |
|
|
673 Juhana K Kouhia <kouhia@nic.funet.fi> wrote: |
|
|
674 |
|
|
675 If I have a one-dimensional signal data with the size 400 |
|
|
676 Mbytes, then what are my choices to operate with it: |
|
|
677 |
|
|
678 * I have to split the data |
|
|
679 * Octave has a virtual memory on its own and I don't have to |
|
|
680 worry about the splitting. |
|
|
681 |
|
|
682 If I split the data, then my easily programmed processing |
|
|
683 programs will become hard to program. |
|
|
684 |
|
|
685 If possible, I would like to have the virtual memory system in |
|
|
686 Octave i.e. the all big files, the user see as one big array or |
|
|
687 such. There could be several user selectable models to do the |
|
|
688 virtual memory depending on what kind of data the user have (1d, |
|
|
689 2d) and in what order they are processed (stream or random |
|
|
690 access). |
|
|
691 |
|
|
692 Perhaps this can be done entirely with a library of M-files. |
|
|
693 |
|
|
694 * Add a function like strptime() which is the opposite of |
|
|
695 strftime(). A C version is apparently in recent releases of the |
|
|
696 Linux C library. |
|
|
697 |
|
2789
|
698 * Add a definition to lgrind so that it supports Octave. |
|
|
699 (See http://www.tex.ac.uk/tex-archive/support/lgrind/ for more |
|
|
700 information about lgrind.) |
|
|
701 |
|
2330
|
702 ------ |
|
|
703 Always: |
|
|
704 ------ |
|
|
705 |
|
|
706 * Squash bugs. |
|
|
707 |
|
|
708 --30-- |
