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