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annotate scripts/plot/meshz.m @ 17309:68bcac3c043a

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Correct inversion accidentally introduced in cset 87ba70043bfc. * scripts/plot/area.m, scripts/plot/axis.m, scripts/plot/caxis.m, scripts/plot/comet.m, scripts/plot/comet3.m, scripts/plot/compass.m, scripts/plot/contour.m, scripts/plot/contour3.m, scripts/plot/contourf.m, scripts/plot/cylinder.m, scripts/plot/ellipsoid.m, scripts/plot/errorbar.m, scripts/plot/feather.m, scripts/plot/fill.m, scripts/plot/loglog.m, scripts/plot/loglogerr.m, scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshz.m, scripts/plot/pcolor.m, scripts/plot/pie.m, scripts/plot/pie3.m, scripts/plot/plot.m, scripts/plot/plot3.m, scripts/plot/polar.m, scripts/plot/private/__bar__.m, scripts/plot/private/__ezplot__.m, scripts/plot/private/__stem__.m, scripts/plot/quiver.m, scripts/plot/quiver3.m, scripts/plot/rectangle.m, scripts/plot/ribbon.m, scripts/plot/rose.m, scripts/plot/scatter.m, scripts/plot/scatter3.m, scripts/plot/semilogx.m, scripts/plot/semilogxerr.m, scripts/plot/semilogy.m, scripts/plot/semilogyerr.m, scripts/plot/slice.m, scripts/plot/sphere.m, scripts/plot/stairs.m, scripts/plot/surf.m, scripts/plot/surfc.m, scripts/plot/surfl.m, scripts/plot/surfnorm.m, scripts/time/datetick.m: check for (! isempty (hax)) before saving current figure.
author Rik <rik@octave.org>
date Tue, 20 Aug 2013 22:23:43 -0700
parents bc924baa2c4e
children 43e0b711d7e0
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rev   line source
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2007-2012 David Bateman
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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
71c03c7239fb [project @ 2007-11-28 02:19:25 by jwe]
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) 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, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} meshz (@var{x}, @var{y}, @var{z})
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21 ## @deftypefnx {Function File} {} meshz (@var{z})
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22 ## @deftypefnx {Function File} {} meshz (@dots{}, @var{c})
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23 ## @deftypefnx {Function File} {} meshz (@dots{}, @var{prop}, @var{val}, @dots{})
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24 ## @deftypefnx {Function File} {} meshz (@var{hax}, @dots{})
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25 ## @deftypefnx {Function File} {@var{h} =} meshz (@dots{})
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26 ## Plot a 3-D wireframe mesh with a surrounding curtain.
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27 ##
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28 ## The wireframe mesh is plotted using rectangles. The vertices of the
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29 ## rectangles [@var{x}, @var{y}] are typically the output of @code{meshgrid}.
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30 ## over a 2-D rectangular region in the x-y plane. @var{z} determines the
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31 ## height above the plane of each vertex. If only a single @var{z} matrix is
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32 ## given, then it is plotted over the meshgrid
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33 ## @code{@var{x} = 1:columns (@var{z}), @var{y} = 1:rows (@var{z})}.
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34 ## Thus, columns of @var{z} correspond to different @var{x} values and rows
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35 ## of @var{z} correspond to different @var{y} values.
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36 ##
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37 ## The color of the mesh is computed by linearly scaling the @var{Z} values
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38 ## to fit the range of the current colormap. Use @code{caxis} and/or
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39 ## change the colormap to control the appearance.
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40 ##
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41 ## Optionally the color of the mesh can be specified independently of @var{z}
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42 ## by supplying a color matrix, @var{c}.
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43 ##
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44 ## Any property/value pairs are passed directly to the underlying surface
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45 ## object.
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46 ##
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47 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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48 ## rather than the current axes returned by @code{gca}.
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49 ##
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50 ## The optional return value @var{h} is a graphics handle to the created
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51 ## surface object.
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52 ##
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53 ## @seealso{mesh, meshc, contour, surf, surface, waterfall, meshgrid, hidden, shading, colormap, caxis}
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54 ## @end deftypefn
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55
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56 function h = meshz (varargin)
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57
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58 if (! all (cellfun ("isreal", varargin)))
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59 error ("meshz: X, Y, Z, C arguments must be real");
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60 endif
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61
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62 [hax, varargin, nargin] = __plt_get_axis_arg__ ("meshz", varargin{:});
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63
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64 ## Find where property/value pairs start
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65 charidx = find (cellfun ("isclass", varargin, "char"), 1);
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66
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67 have_c = false;
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68 if (isempty (charidx))
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69 if (nargin == 2 || nargin == 4)
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70 have_c = true;
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71 charidx = nargin; # bundle C matrix back into varargin
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72 else
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73 charidx = nargin + 1;
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74 endif
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75 endif
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76
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77 if (charidx == 2)
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78 z = varargin{1};
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79 [m, n] = size (z);
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80 x = 1:n;
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81 y = (1:m).';
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82 else
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83 x = varargin{1};
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84 y = varargin{2};
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85 z = varargin{3};
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86 endif
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87
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88 if (isvector (x) && isvector (y))
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89 x = [x(1), x(:).', x(end)];
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90 y = [y(1); y(:); y(end)];
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91 else
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92 x = [x(1,1), x(1,:), x(1,end);
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93 x(:,1), x, x(:,end);
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94 x(end,1), x(end,:), x(end,end)];
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95 y = [y(1,1), y(1,:), y(1,end);
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96 y(:,1), y, y(:,end);
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97 y(end,1), y(end,:), y(end,end)];
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98 endif
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99
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100 zref = min (z(isfinite (z)));
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101 z = [zref .* ones(1, columns(z) + 2);
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102 zref .* ones(rows(z), 1), z, zref .* ones(rows(z), 1);
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103 zref .* ones(1, columns(z) + 2)];
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104
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105 if (have_c)
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106 c = varargin{charidx};
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107 cref = min (c(isfinite (c)));
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108 c = [cref .* ones(1, columns(c) + 2);
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109 cref .* ones(rows(c), 1), c, cref .* ones(rows(c), 1);
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110 cref .* ones(1, columns(c) + 2)];
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111 varargin(charidx) = c;
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112 endif
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113
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114 oldfig = [];
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115 if (! isempty (hax))
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116 oldfig = get (0, "currentfigure");
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117 endif
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118 unwind_protect
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119 hax = newplot (hax);
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120 htmp = mesh (x, y, z, varargin{charidx:end});
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121 unwind_protect_cleanup
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122 if (! isempty (oldfig))
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123 set (0, "currentfigure", oldfig);
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124 endif
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125 end_unwind_protect
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126
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127 if (nargout > 0)
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128 h = htmp;
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129 endif
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71c03c7239fb [project @ 2007-11-28 02:19:25 by jwe]
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71c03c7239fb [project @ 2007-11-28 02:19:25 by jwe]
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131 endfunction
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c9346014fed2 Validate inputs are real for mesh, meshc, meshz functions.
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134 %!demo
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135 %! clf;
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136 %! colormap ('default');
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137 %! Z = peaks ();
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138 %! meshz (Z);
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139 %! title ('meshz() plot of peaks() function');
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140
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141 %!demo
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142 %! clf;
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143 %! colormap ('default');
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144 %! Z = peaks ();
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145 %! subplot (1,2,1)
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146 %! mesh (Z);
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147 %! daspect ([2.5, 2.5, 1]);
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148 %! title ('mesh() plot');
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149 %! subplot (1,2,2)
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150 %! meshz (Z);
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151 %! daspect ([2.5, 2.5, 1]);
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152 %! title ('meshz() plot');
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153
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154 %!demo
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155 %! clf;
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156 %! colormap ('default');
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157 %! [X,Y,Z] = peaks ();
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158 %! [fx, fy] = gradient (Z);
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159 %! C = sqrt (fx.^2 + fy.^2);
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160 %! meshz (X,Y,Z,C);
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161 %! title ('meshz() plot with color determined by gradient');
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