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1 ## Copyright (C) 1996, 1997 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 ## 02110-1301, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} subplot (@var{rows}, @var{cols}, @var{index}) |
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22 ## @deftypefnx {Function File} {} subplot (@var{rcn}) |
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23 ## Set up a plot grid with @var{cols} by @var{rows} subwindows and plot |
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24 ## in location given by @var{index}. |
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25 ## |
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26 ## If only one argument is supplied, then it must be a three digit value |
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27 ## specifying the location in digits 1 (rows) and 2 (columns) and the plot |
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28 ## index in digit 3. |
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29 ## |
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30 ## The plot index runs row-wise. First all the columns in a row are filled |
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31 ## and then the next row is filled. |
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32 ## |
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33 ## For example, a plot with 2 by 3 grid will have plot indices running as |
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34 ## follows: |
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35 ## @iftex |
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36 ## @tex |
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37 ## \vskip 10pt |
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38 ## \hfil\vbox{\offinterlineskip\hrule |
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39 ## \halign{\vrule#&&\qquad\hfil#\hfil\qquad\vrule\cr |
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40 ## height13pt&1&2&3&4\cr height12pt&&&&\cr\noalign{\hrule} |
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41 ## height13pt&5&6&7&8\cr height12pt&&&&\cr\noalign{\hrule}}} |
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42 ## \hfil |
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43 ## \vskip 10pt |
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44 ## @end tex |
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45 ## @end iftex |
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46 ## @ifinfo |
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47 ## @display |
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48 ## @group |
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49 ## @example |
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50 ## |
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51 ## +-----+-----+-----+-----+ |
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52 ## | 1 | 2 | 3 | 4 | |
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53 ## +-----+-----+-----+-----+ |
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54 ## | 5 | 6 | 7 | 8 | |
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55 ## +-----+-----+-----+-----+ |
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56 ## @end example |
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57 ## @end group |
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58 ## @end display |
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59 ## @end ifinfo |
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60 ## @seealso{plot} |
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61 ## @end deftypefn |
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62 |
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63 ## Author: Vinayak Dutt <Dutt.Vinayak@mayo.EDU> |
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64 ## Adapted-By: jwe |
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65 |
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66 function h = subplot (rows, columns, index) |
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67 |
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68 if (nargin != 3 && nargin != 1) |
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69 print_usage (); |
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70 endif |
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71 |
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72 if (nargin == 1) |
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73 |
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74 if (! (isscalar (rows) && rows >= 0)) |
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75 error ("subplot: input rcn has to be a positive scalar"); |
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76 endif |
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77 |
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78 tmp = rows; |
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79 index = rem (tmp, 10); |
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80 tmp = (tmp - index) / 10; |
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81 columns = rem (tmp, 10); |
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82 tmp = (tmp - columns) / 10; |
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83 rows = rem (tmp, 10); |
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84 |
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85 elseif (! (isscalar (columns) && isscalar (rows) && isscalar (index))) |
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86 error ("subplot: columns, rows, and index have to be scalars"); |
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87 endif |
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88 |
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89 columns = round (columns); |
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90 rows = round (rows); |
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91 index = round (index); |
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92 |
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93 if (index > columns*rows) |
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94 error ("subplot: index must be less than columns*rows"); |
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95 endif |
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96 |
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97 if (columns < 1 || rows < 1 || index < 1) |
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98 error ("subplot: columns,rows,index must be be positive"); |
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99 endif |
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100 |
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101 xsize = 1 / columns; |
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102 ysize = 1 / rows; |
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103 |
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104 yp = fix ((index-1)/columns); |
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105 xp = index - yp*columns - 1; |
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106 |
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107 x0 = xp * xsize; |
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108 y0 = (rows - yp - 1) * ysize; |
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109 |
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110 pos = [x0, y0, xsize, ysize]; |
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111 |
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112 x1 = x0 + xsize; |
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113 y1 = y0 + ysize; |
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114 |
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115 cf = gcf (); |
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116 |
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117 set (cf, "nextplot", "add"); |
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118 |
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119 obj = get (cf); |
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120 |
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121 found = false; |
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122 for child = obj.children |
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123 obj = get (child); |
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124 if (strcmp (obj.type, "axes")) |
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125 objpos = obj.outerposition; |
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126 if (objpos == pos) |
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127 ## If the new axes are in exactly the same position as an |
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128 ## existing axes object, use the existing axes. |
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129 found = true; |
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130 tmp = child; |
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131 break; |
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132 else |
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133 ## If the new axes overlap an old axes object, delete the old |
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134 ## axes. |
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135 objx0 = objpos(1); |
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136 objx1 = objx0 + objpos(3); |
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137 objy0 = objpos(2); |
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138 objy1 = objy0 + objpos(4); |
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139 if (! (x0 >= objx1 || x1 <= objx0 || y0 >= objy1 || y1 <= objy0)) |
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140 delete (child); |
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141 endif |
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142 endif |
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143 endif |
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144 endfor |
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145 |
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146 if (found) |
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147 set (cf, "currentaxes", tmp); |
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148 else |
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149 tmp = axes ("outerposition", pos); |
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150 endif |
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151 |
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152 if (nargout > 0) |
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153 h = tmp; |
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154 endif |
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155 |
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156 endfunction |
