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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} {} __bar__ (@dots{}) |
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22 ## Support function for @code{bar} and @code{hbar}. |
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23 ## @seealso{bar, hbar} |
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24 ## @end deftypefn |
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25 |
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26 ## Author: jwe |
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27 |
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28 function varargout = __bar__ (vertical, func, varargin) |
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29 |
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30 width = 0.8; |
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31 group = true; |
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32 |
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33 if (nargin < 3) |
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34 print_usage (); |
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35 endif |
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36 |
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37 if (nargin > 3 && isnumeric (varargin{2})) |
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38 x = varargin{1}; |
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39 if (isvector (x)) |
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40 x = x(:); |
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41 endif |
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42 y = varargin{2}; |
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43 if (isvector (y)) |
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44 y = y(:); |
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45 endif |
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46 if (size (x, 1) != size (y, 1)) |
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47 y = varargin{1}; |
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48 if (isvector (y)) |
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49 y = y(:); |
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50 endif |
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51 x = [1:size(y,1)]'; |
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52 idx = 2; |
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53 else |
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54 if (! isvector (x)) |
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55 error ("%s: x must be a vector", func); |
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56 endif |
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57 idx = 3; |
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58 endif |
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59 else |
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60 y = varargin{1}; |
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61 if (isvector (y)) |
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62 y = y(:); |
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63 endif |
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64 x = [1:size(y,1)]'; |
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65 idx = 2; |
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66 endif |
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67 |
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68 newargs = {}; |
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69 have_line_spec = false; |
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70 while (idx <= nargin -2) |
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71 if (isstr (varargin{idx}) && strcmp (varargin{idx}, "grouped")) |
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72 group = true; |
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73 idx++; |
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74 elseif (isstr (varargin{idx}) && strcmp (varargin{idx}, "stacked")) |
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75 group = false; |
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76 idx++; |
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77 else |
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78 if ((isstr (varargin{idx}) || iscell (varargin{idx})) |
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79 && ! have_line_spec) |
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80 [linespec, valid] = __pltopt__ (func, varargin{idx}, false); |
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81 if (valid) |
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82 have_line_spec = true; |
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83 newargs = [{linespec.color}, newargs]; |
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84 idx++; |
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85 continue; |
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86 endif |
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87 endif |
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88 if (isscalar(varargin{idx})) |
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89 width = varargin{idx++}; |
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90 elseif (idx == nargin - 2) |
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91 newargs = [newargs,varargin(idx++)]; |
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92 else |
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93 newargs = [newargs,varargin(idx:idx+1)]; |
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94 idx += 2; |
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95 endif |
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96 endif |
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97 endwhile |
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98 |
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99 xlen = size (x, 1); |
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100 ylen = size (y, 1); |
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101 |
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102 if (xlen != ylen) |
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103 error ("%s: length of x and y must be equal", func) |
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104 endif |
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105 if (any (x(2:end) < x(1:end-1))) |
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106 error ("%s: x vector values must be in ascending order", func); |
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107 endif |
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108 |
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109 ycols = size (y, 2); |
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110 if (group) |
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111 width = width / ycols; |
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112 endif |
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113 |
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114 cutoff = (x(1:end-1) + x(2:end)) / 2; |
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115 delta_p = [(cutoff - x(1:end-1)); (x(end) - cutoff(end))] * width; |
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116 delta_m = [(cutoff(1) - x(1)); (x(2:end) - cutoff)] * width; |
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117 x1 = (x - delta_m)(:)'; |
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118 x2 = (x + delta_p)(:)'; |
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119 xb = repmat ([x1; x1; x2; x2](:), 1, ycols); |
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120 |
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121 if (group) |
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122 width = width / ycols; |
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123 offset = ((delta_p + delta_m) * [-(ycols - 1) / 2 : (ycols - 1) / 2]); |
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124 xb(1:4:4*ylen,:) += offset; |
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125 xb(2:4:4*ylen,:) += offset; |
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126 xb(3:4:4*ylen,:) += offset; |
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127 xb(4:4:4*ylen,:) += offset; |
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128 y0 = zeros (size (y)); |
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129 y1 = y; |
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130 else |
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131 y1 = cumsum(y,2); |
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132 y0 = [zeros(ylen,1), y1(:,1:end-1)]; |
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133 endif |
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134 |
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135 yb = zeros (4*ylen, ycols); |
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136 yb(1:4:4*ylen,:) = y0; |
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137 yb(2:4:4*ylen,:) = y1; |
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138 yb(3:4:4*ylen,:) = y1; |
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139 yb(4:4:4*ylen,:) = y0; |
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140 |
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141 xb = reshape (xb, 4, numel (xb) / 4); |
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142 yb = reshape (yb, 4, numel (yb) / 4); |
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143 |
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144 if (! have_line_spec) |
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145 colors = [1, 0, 0; 0, 1, 0; 0, 0, 1; 1, 1, 0; 1, 0, 1; 0, 1, 1]; |
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146 newargs = [{shiftdim(colors (mod (floor ([0 : (ycols * ylen - 1)] / ylen), |
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147 6) + 1, :), -1)}, newargs]; |
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148 endif |
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149 |
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150 if (vertical) |
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151 if (nargout < 1) |
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152 patch (xb, yb, newargs {:}); |
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153 elseif (nargout < 2) |
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154 varargout{1} = patch (xb, yb, newargs {:}); |
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155 else |
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156 varargout{1} = xb; |
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157 varargout{2} = yb; |
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158 endif |
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159 else |
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160 if (nargout < 1) |
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161 patch (yb, xb, newargs{:}); |
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162 elseif (nargout < 2) |
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163 varargout{1} = patch (yb, xb, newargs{:}); |
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164 else |
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165 varargout{1} = yb; |
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166 varargout{2} = xb; |
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167 endif |
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168 endif |
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169 |
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170 endfunction |
