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1 ## Copyright (C) 1996 John W. Eaton |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## usage: subplot (rows, columns, index) |
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21 ## subplot (rcn) |
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22 ## |
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23 ## NOTE: this will work only with gnuplot installed with |
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24 ## multiplot patch (or version 3.6 beta) |
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25 ## |
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26 ## Sets gnuplot in multiplot mode and plots in location |
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27 ## given by index (there are columns X rows subwindows) |
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28 ## |
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29 ## Input: |
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30 ## |
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31 ## rows : number of rows in subplot grid |
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32 ## columns: number of columns in subplot grid |
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33 ## index : index of subplot where to make the next plot |
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34 ## |
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35 ## If only one arg, then it (crn) has to be three digit value |
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36 ## specifying the location in digit 1 (rows) and 2 (columns) and digit |
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37 ## 3 is the plot index |
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38 ## |
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39 ## The plot index runs row-wise,i.e., first all the columns in a row |
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40 ## are filled and then the next row is filled |
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41 ## |
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42 ## For example, plot with 4 X 2 grid, will have plot indices running as |
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43 ## follows: |
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44 ## |
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45 ## ----------------------------------- |
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46 ## | | | | | |
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47 ## | 1 | 2 | 3 | 4 | |
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48 ## | | | | | |
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49 ## ----------------------------------- |
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50 ## | | | | | |
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51 ## | 5 | 6 | 7 | 8 | |
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52 ## | | | | | |
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53 ## ----------------------------------- |
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54 ## |
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55 |
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56 ## Author: Vinayak Dutt <Dutt.Vinayak@mayo.EDU> |
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57 ## Adapted-By: jwe |
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58 |
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59 function subplot (rows, columns, index) |
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60 |
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61 if (! gnuplot_has_multiplot) |
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62 error ("subplot: gnuplot does not appear to support this feature"); |
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63 endif |
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64 |
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65 ## global variables to keep track of multiplot options |
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66 |
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67 global multiplot_mode |
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68 global multiplot_xsize multiplot_ysize |
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69 global multiplot_xn multiplot_yn |
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70 global multiplot_xi multiplot_yi |
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71 |
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72 ## This is a real kludge. We gnuplot should be made so that replot can |
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73 ## be executed while doing multiple plots... |
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74 |
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75 global multiplot_save_auto_replot = automatic_replot |
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76 |
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77 if (nargin != 3 && nargin != 1) |
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78 usage ("subplot (rows, columns, index) or subplot (rcn)"); |
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79 endif |
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80 |
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81 if (automatic_replot) |
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82 warning ("turning off automatic replot for multiplot mode"); |
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83 multiplot_save_auto_replot = automatic_replot; |
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84 automatic_replot = 0; |
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85 endif |
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86 |
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87 if (nargin == 1) |
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88 |
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89 if (! (is_scalar (rows) && rows >= 0)) |
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90 error ("subplot: input rcn has to be a positive scalar"); |
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91 endif |
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92 |
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93 tmp = rows; |
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94 index = rem (tmp, 10); |
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95 tmp = (tmp - index) / 10; |
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96 columns = rem (tmp, 10); |
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97 tmp = (tmp - columns) / 10; |
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98 rows = rem (tmp, 10); |
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99 |
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100 elseif (! (is_scalar (columns) && is_scalar (rows) && is_scalar (index))) |
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101 error ("subplot: columns, rows, and index have to be scalars"); |
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102 endif |
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103 |
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104 columns = round (columns); |
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105 rows = round (rows); |
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106 index = round (index); |
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107 |
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108 if (index > columns*rows) |
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109 error ("subplot: index must be less than columns*rows"); |
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110 endif |
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111 |
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112 if (columns < 1 || rows < 1 || index < 1) |
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113 error ("subplot: columns,rows,index must be be positive"); |
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114 endif |
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115 |
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116 if (columns*rows == 1) |
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117 |
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118 ## switching to single plot ? |
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119 |
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120 set nomultiplot; |
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121 set size 1, 1; |
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122 set origin 0, 0; |
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123 |
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124 multiplot_xn = 1; |
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125 multiplot_yn = 1; |
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126 multiplot_mode = 0; |
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127 |
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128 ## Someone may have reset it betweeen calls... |
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129 |
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130 if (! isstr (automatic_replot) && ! automatic_replot) |
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131 automatic_replot = multiplot_save_auto_replot; |
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132 endif |
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133 |
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134 else |
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135 |
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136 ## doing multiplot plots |
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137 |
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138 doagain = 0; |
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139 |
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140 if (exist ("multiplot_mode") != 1) |
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141 doagain = 1; |
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142 elseif (multiplot_mode != 1 || multiplot_xn != columns |
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143 || multiplot_yn != rows) |
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144 doagain = 1; |
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145 endif |
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146 |
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147 if (doagain) |
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148 |
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149 multiplot_mode = 1; |
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150 multiplot_xn = columns; |
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151 multiplot_yn = rows; |
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152 multiplot_xsize = 1.0 ./ columns; |
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153 multiplot_ysize = 1.0 ./ rows; |
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154 |
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155 set multiplot; |
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156 |
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157 eval (sprintf ("set size %g, %g", multiplot_xsize, multiplot_ysize)); |
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158 |
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159 endif |
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160 |
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161 ## get the sub plot location |
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162 |
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163 yp = fix ((index-1)/columns); |
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164 xp = index - yp*columns - 1; |
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165 multiplot_xi = ++xp; |
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166 multiplot_yi = ++yp; |
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167 |
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168 ## set the origin |
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169 |
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170 xo = (xp - 1.0)*multiplot_xsize; |
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171 yo = (rows - yp)*multiplot_ysize; |
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172 |
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173 eval (sprintf ("set origin %g, %g", xo, yo)); |
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174 |
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175 endif |
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176 |
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177 endfunction |
