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annotate scripts/plot/surfc.m @ 17130:26589abbc78d

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Don't pass axis handle unnecessarily from high level to low level plot functions. * scripts/plot/comet.m, scripts/plot/comet3.m, scripts/plot/compass.m, scripts/plot/contour.m, scripts/plot/contourf.m, scripts/plot/cylinder.m, scripts/plot/ellipsoid.m, scripts/plot/errorbar.m, scripts/plot/feather.m, scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshz.m, scripts/plot/pcolor.m, scripts/plot/plot3.m, scripts/plot/rectangle.m, scripts/plot/rose.m, scripts/plot/scatter3.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/surfnorm.m, scripts/plot/trimesh.m, scripts/plot/trisurf.m: Don't pass hax to lower level functions after newplot() has been called.
author Rik <rik@octave.org>
date Wed, 31 Jul 2013 18:42:17 -0700
parents eaab03308c0b
children 0a761f218d8d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
14138
72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1996-2012 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
d32f867e4dda [project @ 2007-11-07 20:44:11 by jwe]
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7 ## the Free Software Foundation; either version 3 of the License, or (at
d32f867e4dda [project @ 2007-11-07 20:44:11 by jwe]
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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} {} surfc (@var{x}, @var{y}, @var{z})
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21 ## @deftypefnx {Function File} {} surfc (@var{z})
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22 ## @deftypefnx {Function File} {} surfc (@dots{}, @var{c})
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23 ## @deftypefnx {Function File} {} surfc (@dots{}, @var{prop}, @var{val}, @dots{})
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24 ## @deftypefnx {Function File} {} surfc (@var{hax}, @dots{})
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25 ## @deftypefnx {Function File} {@var{h} =} surfc (@dots{})
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26 ## Plot a 3-D surface mesh with underlying contour lines.
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27 ##
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28 ## The surface mesh is plotted using shaded 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 surface 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 surface can be specified independently of
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42 ## @var{z} 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 ## Note: The exact appearance of the surface can be controlled with the
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54 ## @code{shading} command or by using @code{set} to control surface object
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55 ## properties.
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56 ## @seealso{ezsurfc, surf, surfl, surfnorm, trisurf, contour, mesh, surface, meshgrid, hidden, shading, colormap, caxis}
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57 ## @end deftypefn
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58
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59 function h = surfc (varargin)
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60
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61 [hax, varargin, nargin] = __plt_get_axis_arg__ ("surfc", varargin{:});
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62
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63 if (nargin < 1)
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64 print_usage ();
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65 endif
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66
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67 oldfig = ifelse (isempty (hax), [], get (0, "currentfigure"));
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68 unwind_protect
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69 hax = newplot (hax);
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70
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71 htmp = surface (varargin{:});
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72
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73 set (htmp, "facecolor", "flat");
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74 if (! ishold ())
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75 set (hax, "view", [-37.5, 30],
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76 "xgrid", "on", "ygrid", "on", "zgrid", "on");
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77 endif
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78
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79 drawnow ();
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81 # don't pass string arguments to __contour__()
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82 stop_idx = find (cellfun ("isclass", varargin, "char"), 1);
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83 if (isempty (stop_idx))
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84 stop_idx = nargin;
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85 else
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86 stop_idx--;
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87 endif
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88
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89 if (stop_idx - 1 == 1 || stop_idx - 1 == 3)
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90 ## Don't pass a color matrix c to __contour__
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91 stop_idx -= 1;
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92 endif
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93
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94 zmin = get (hax, "zlim")(1);
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95 [~, htmp2] = __contour__ (hax, zmin, varargin{1:stop_idx});
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97 htmp = [htmp; htmp2];
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98
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99 unwind_protect_cleanup
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100 if (! isempty (oldfig))
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101 set (0, "currentfigure", oldfig);
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102 endif
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103 end_unwind_protect
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104
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105 if (nargout > 0)
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106 h = htmp;
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107 endif
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108
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109 endfunction
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110
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111
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112 %!demo
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113 %! clf;
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114 %! colormap ('default');
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115 %! Z = peaks ();
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116 %! surfc (Z);
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117
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118 %!demo
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119 %! clf;
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120 %! colormap ('default');
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121 %! Z = sombrero ();
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122 %! [Fx,Fy] = gradient (Z);
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123 %! surfc (Z, Fx+Fy);
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124 %! shading interp;
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125
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126 %!demo
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127 %! clf;
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128 %! colormap ('default');
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129 %! [X,Y,Z] = sombrero ();
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130 %! [~,Fy] = gradient (Z);
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131 %! surfc (X,Y,Z,Fy);
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132 %! shading interp;
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133