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annotate liboctave/fColVector.cc @ 11518:141b3fb5cef7

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style fixes
author John W. Eaton <jwe@octave.org>
date Thu, 13 Jan 2011 16:52:30 -0500
parents 4d1fc073fbb7
children fd0a3ac60b0e
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1 // ColumnVector manipulations.
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2 /*
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3
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4 Copyright (C) 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003, 2004,
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5 2005, 2007, 2008 John W. Eaton
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6 Copyright (C) 2010 VZLU Prague
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7
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8 This file is part of Octave.
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9
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10 Octave is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 3 of the License, or (at your
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13 option) any later version.
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14
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15 Octave is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with Octave; see the file COPYING. If not, see
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22 <http://www.gnu.org/licenses/>.
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23
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24 */
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25
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26 #ifdef HAVE_CONFIG_H
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27 #include <config.h>
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28 #endif
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29
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30 #include <iostream>
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31
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32 #include "Array-util.h"
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33 #include "f77-fcn.h"
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34 #include "functor.h"
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35 #include "lo-error.h"
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36 #include "mx-base.h"
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37 #include "mx-inlines.cc"
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38 #include "oct-cmplx.h"
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39
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40 // Fortran functions we call.
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41
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42 extern "C"
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43 {
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44 F77_RET_T
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45 F77_FUNC (sgemv, SGEMV) (F77_CONST_CHAR_ARG_DECL,
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46 const octave_idx_type&, const octave_idx_type&,
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47 const float&, const float*, const octave_idx_type&,
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48 const float*, const octave_idx_type&, const float&,
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49 float*, const octave_idx_type&
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50 F77_CHAR_ARG_LEN_DECL);
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51 }
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52
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53 // Column Vector class.
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54
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55 bool
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56 FloatColumnVector::operator == (const FloatColumnVector& a) const
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57 {
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58 octave_idx_type len = length ();
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59 if (len != a.length ())
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60 return 0;
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61 return mx_inline_equal (len, data (), a.data ());
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62 }
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63
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64 bool
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65 FloatColumnVector::operator != (const FloatColumnVector& a) const
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66 {
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67 return !(*this == a);
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68 }
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69
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70 FloatColumnVector&
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71 FloatColumnVector::insert (const FloatColumnVector& a, octave_idx_type r)
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72 {
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73 octave_idx_type a_len = a.length ();
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74
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75 if (r < 0 || r + a_len > length ())
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76 {
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77 (*current_liboctave_error_handler) ("range error for insert");
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78 return *this;
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79 }
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80
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81 if (a_len > 0)
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82 {
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83 make_unique ();
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84
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85 for (octave_idx_type i = 0; i < a_len; i++)
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86 xelem (r+i) = a.elem (i);
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87 }
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88
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89 return *this;
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90 }
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91
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92 FloatColumnVector&
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93 FloatColumnVector::fill (float val)
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94 {
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95 octave_idx_type len = length ();
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96
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97 if (len > 0)
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98 {
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99 make_unique ();
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100
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101 for (octave_idx_type i = 0; i < len; i++)
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102 xelem (i) = val;
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103 }
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104
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105 return *this;
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106 }
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107
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108 FloatColumnVector&
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109 FloatColumnVector::fill (float val, octave_idx_type r1, octave_idx_type r2)
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110 {
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111 octave_idx_type len = length ();
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112
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113 if (r1 < 0 || r2 < 0 || r1 >= len || r2 >= len)
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114 {
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115 (*current_liboctave_error_handler) ("range error for fill");
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116 return *this;
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117 }
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118
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119 if (r1 > r2) { octave_idx_type tmp = r1; r1 = r2; r2 = tmp; }
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120
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121 if (r2 >= r1)
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122 {
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123 make_unique ();
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124
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125 for (octave_idx_type i = r1; i <= r2; i++)
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126 xelem (i) = val;
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127 }
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128
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129 return *this;
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130 }
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131
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132 FloatColumnVector
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133 FloatColumnVector::stack (const FloatColumnVector& a) const
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134 {
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135 octave_idx_type len = length ();
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136 octave_idx_type nr_insert = len;
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137 FloatColumnVector retval (len + a.length ());
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138 retval.insert (*this, 0);
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139 retval.insert (a, nr_insert);
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140 return retval;
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141 }
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142
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143 FloatRowVector
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144 FloatColumnVector::transpose (void) const
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145 {
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146 return MArray<float>::transpose();
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147 }
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148
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149 FloatColumnVector
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150 FloatColumnVector::abs (void) const
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151 {
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152 return do_mx_unary_map<float, float, std::abs> (*this);
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153 }
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154
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155 FloatColumnVector
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156 real (const FloatComplexColumnVector& a)
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157 {
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158 return do_mx_unary_op<float, FloatComplex> (a, mx_inline_real);
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159 }
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160
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161 FloatColumnVector
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162 imag (const FloatComplexColumnVector& a)
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163 {
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164 return do_mx_unary_op<float, FloatComplex> (a, mx_inline_imag);
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165 }
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166
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167 // resize is the destructive equivalent for this one
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168
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169 FloatColumnVector
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170 FloatColumnVector::extract (octave_idx_type r1, octave_idx_type r2) const
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171 {
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172 if (r1 > r2) { octave_idx_type tmp = r1; r1 = r2; r2 = tmp; }
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173
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174 octave_idx_type new_r = r2 - r1 + 1;
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175
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176 FloatColumnVector result (new_r);
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177
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178 for (octave_idx_type i = 0; i < new_r; i++)
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179 result.xelem (i) = elem (r1+i);
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180
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181 return result;
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182 }
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183
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184 FloatColumnVector
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185 FloatColumnVector::extract_n (octave_idx_type r1, octave_idx_type n) const
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186 {
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187 FloatColumnVector result (n);
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188
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189 for (octave_idx_type i = 0; i < n; i++)
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190 result.xelem (i) = elem (r1+i);
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191
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192 return result;
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193 }
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194
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195 // matrix by column vector -> column vector operations
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196
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197 FloatColumnVector
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198 operator * (const FloatMatrix& m, const FloatColumnVector& a)
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199 {
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200 FloatColumnVector retval;
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201
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202 octave_idx_type nr = m.rows ();
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203 octave_idx_type nc = m.cols ();
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204
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205 octave_idx_type a_len = a.length ();
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206
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207 if (nc != a_len)
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208 gripe_nonconformant ("operator *", nr, nc, a_len, 1);
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209 else
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210 {
9625
cbabf50315ca optimize Matrix*ColumnVector
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211 retval.clear (nr);
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212
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213 if (nr != 0)
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214 {
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215 float *y = retval.fortran_vec ();
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216
9625
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217 F77_XFCN (sgemv, SGEMV, (F77_CONST_CHAR_ARG2 ("N", 1),
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218 nr, nc, 1.0f, m.data (), nr,
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219 a.data (), 1, 0.0f, y, 1
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220 F77_CHAR_ARG_LEN (1)));
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221 }
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222 }
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223
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224 return retval;
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225 }
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226
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227 // diagonal matrix by column vector -> column vector operations
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228
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229 FloatColumnVector
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230 operator * (const FloatDiagMatrix& m, const FloatColumnVector& a)
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231 {
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232 FloatColumnVector retval;
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233
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234 octave_idx_type nr = m.rows ();
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235 octave_idx_type nc = m.cols ();
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236
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237 octave_idx_type a_len = a.length ();
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238
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239 if (nc != a_len)
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240 gripe_nonconformant ("operator *", nr, nc, a_len, 1);
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241 else
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242 {
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243 if (nr == 0 || nc == 0)
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244 retval.resize (nr, 0.0);
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245 else
10314
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246 {
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247 retval.resize (nr);
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248
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249 for (octave_idx_type i = 0; i < a_len; i++)
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250 retval.elem (i) = a.elem (i) * m.elem (i, i);
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251
10314
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252 for (octave_idx_type i = a_len; i < nr; i++)
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253 retval.elem (i) = 0.0;
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254 }
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255 }
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256
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257 return retval;
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258 }
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259
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260 // other operations
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261
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262 float
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263 FloatColumnVector::min (void) const
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diff changeset
264 {
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265 octave_idx_type len = length ();
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266 if (len == 0)
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267 return 0.0;
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268
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269 float res = elem (0);
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270
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271 for (octave_idx_type i = 1; i < len; i++)
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272 if (elem (i) < res)
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273 res = elem (i);
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274
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275 return res;
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276 }
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277
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278 float
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279 FloatColumnVector::max (void) const
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280 {
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281 octave_idx_type len = length ();
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282 if (len == 0)
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283 return 0.0;
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284
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285 float res = elem (0);
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286
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287 for (octave_idx_type i = 1; i < len; i++)
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288 if (elem (i) > res)
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289 res = elem (i);
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290
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291 return res;
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292 }
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293
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294 std::ostream&
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295 operator << (std::ostream& os, const FloatColumnVector& a)
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296 {
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297 // int field_width = os.precision () + 7;
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298 for (octave_idx_type i = 0; i < a.length (); i++)
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299 os << /* setw (field_width) << */ a.elem (i) << "\n";
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300 return os;
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301 }
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302
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diff changeset
303 std::istream&
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diff changeset
304 operator >> (std::istream& is, FloatColumnVector& a)
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305 {
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306 octave_idx_type len = a.length();
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307
8999
dc07bc4157b8 allow empty matrices in stream input operators
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parents: 8920
diff changeset
308 if (len > 0)
7789
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309 {
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310 float tmp;
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311 for (octave_idx_type i = 0; i < len; i++)
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312 {
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313 is >> tmp;
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314 if (is)
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315 a.elem (i) = tmp;
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diff changeset
316 else
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diff changeset
317 break;
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318 }
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319 }
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320 return is;
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321 }