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ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__. * scripts/plot/ribbon.m, scripts/plot/slice.m: Overhaul to use __plt_get_axis_arg__. Redo docstring.
author Rik <rik@octave.org>
date Wed, 24 Jul 2013 23:12:46 -0700
parents 6239f5806c26
children eaab03308c0b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2007-2012 Kai Habel, 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
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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} {} slice (@var{x}, @var{y}, @var{z}, @var{v}, @var{sx}, @var{sy}, @var{sz})
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21 ## @deftypefnx {Function File} {} slice (@var{x}, @var{y}, @var{z}, @var{v}, @var{xi}, @var{yi}, @var{zi})
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22 ## @deftypefnx {Function File} {} slice (@var{v}, @var{sx}, @var{sy}, @var{sz})
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23 ## @deftypefnx {Function File} {} slice (@var{v}, @var{xi}, @var{yi}, @var{zi})
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24 ## @deftypefnx {Function File} {} slice (@dots{}, @var{method})
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25 ## @deftypefnx {Function File} {} slice (@var{hax}, @dots{})
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26 ## @deftypefnx {Function File} {@var{h} =} slice (@dots{})
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27 ## Plot slices of 3-D data/scalar fields.
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28 ##
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29 ## Each element of the 3-dimensional
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30 ## array @var{v} represents a scalar value at a location given by the
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31 ## parameters @var{x}, @var{y}, and @var{z}. The parameters @var{x},
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32 ## @var{x}, and @var{z} are either 3-dimensional arrays of the same size
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33 ## as the array @var{v} in the "meshgrid" format or vectors. The
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34 ## parameters @var{xi}, etc. respect a similar format to @var{x}, etc.,
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35 ## and they represent the points at which the array @var{vi} is
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36 ## interpolated using interp3. The vectors @var{sx}, @var{sy}, and
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37 ## @var{sz} contain points of orthogonal slices of the respective axes.
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38 ##
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39 ## If @var{x}, @var{y}, @var{z} are omitted, they are assumed to be
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40 ## @code{x = 1:size (@var{v}, 2)}, @code{y = 1:size (@var{v}, 1)} and
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41 ## @code{z = 1:size (@var{v}, 3)}.
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42 ##
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43 ## @var{method} is one of:
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44 ##
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45 ## @table @asis
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46 ## @item "nearest"
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47 ## Return the nearest neighbor.
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48 ##
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49 ## @item "linear"
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50 ## Linear interpolation from nearest neighbors.
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51 ##
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52 ## @item "cubic"
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53 ## Cubic interpolation from four nearest neighbors (not implemented yet).
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54 ##
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55 ## @item "spline"
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56 ## Cubic spline interpolation---smooth first and second derivatives
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57 ## throughout the curve.
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58 ## @end table
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59 ##
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60 ## The default method is "linear".
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61 ##
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62 ## If the first argument @var{hax} is an axis handle, then plot into this axis,
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63 ## rather than the current axis handle returned by @code{gca}.
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64 ##
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65 ## The optional return value @var{h} is a graphics handle to the created
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66 ## surface object.
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67 ##
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68 ## Examples:
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69 ##
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70 ## @example
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71 ## @group
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72 ## [x, y, z] = meshgrid (linspace (-8, 8, 32));
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73 ## v = sin (sqrt (x.^2 + y.^2 + z.^2)) ./ (sqrt (x.^2 + y.^2 + z.^2));
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74 ## slice (x, y, z, v, [], 0, []);
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75 ##
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76 ## [xi, yi] = meshgrid (linspace (-7, 7));
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77 ## zi = xi + yi;
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78 ## slice (x, y, z, v, xi, yi, zi);
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79 ## @end group
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80 ## @end example
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81 ## @seealso{interp3, surface, pcolor}
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82 ## @end deftypefn
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83
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84 ## Author: Kai Habel <kai.habel@gmx.de>
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85
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86 function h = slice (varargin)
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87
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88 [hax, varargin, nargs] = __plt_get_axis_arg__ ("slice", varargin{:});
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89
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90 method = "linear";
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91
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92 if (ischar (varargin{end}))
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93 method = varargin{end};
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94 nargs -= 1;
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95 endif
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96
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97 if (nargs == 4)
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98 v = varargin{1};
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99 if (ndims (v) != 3)
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100 error ("slice: V must be a 3-dimensional array of values");
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101 endif
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102 [nx, ny, nz] = size (v);
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103 [x, y, z] = meshgrid (1:nx, 1:ny, 1:nz);
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104 sx = varargin{2};
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105 sy = varargin{3};
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106 sz = varargin{4};
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107 elseif (nargs == 7)
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108 v = varargin{4};
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109 if (ndims (v) != 3)
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110 error ("slice: V must be a 3-dimensional array of values");
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111 endif
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112 x = varargin{1};
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113 y = varargin{2};
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114 z = varargin{3};
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115 if (isvector (x) && isvector (y) && isvector (z))
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116 [x, y, z] = meshgrid (x, y, z);
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117 elseif (ndims (x) == 3 && size_equal (x, y, z))
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118 ## Do nothing.
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119 else
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120 error ("slice: X, Y, Z size mismatch");
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121 endif
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122 sx = varargin{5};
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123 sy = varargin{6};
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124 sz = varargin{7};
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125 else
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126 print_usage ();
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127 endif
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128
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129 if (any ([isvector(sx), isvector(sy), isvector(sz)]))
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130 have_sval = true;
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131 elseif (ndims (sx) == 2 && size_equal (sx, sy, sz))
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132 have_sval = false;
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133 else
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134 error ("slice: dimensional mismatch for (XI, YI, ZI) or (SX, SY, SZ)");
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135 endif
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136
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diff changeset
137 oldfig = ifelse (isempty (hax), [], get (0, "currentfigure"));
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138 unwind_protect
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139 hax = newplot (hax);
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140
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141 sidx = 1;
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
142 minv = min (v(:));
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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143 maxv = max (v(:));
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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144 set (hax, "clim", [minv, maxv]);
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145
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diff changeset
146 if (have_sval)
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147 ns = length (sx) + length (sy) + length (sz);
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148 hs = zeros (ns,1);
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149 [ny, nx, nz] = size (v);
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150 if (length (sz) > 0)
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151 for i = 1:length (sz)
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152 [xi, yi, zi] = meshgrid (squeeze (x(1,:,1)),
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153 squeeze (y(:,1,1)), sz(i));
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154 vz = squeeze (interp3 (x, y, z, v, xi, yi, zi, method));
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diff changeset
155 htmp(sidx++) = surface (xi, yi, sz(i) * ones (size (yi)), vz);
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156 endfor
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157 endif
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158
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159 if (length (sy) > 0)
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diff changeset
160 for i = length (sy):-1:1
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diff changeset
161 [xi, yi, zi] = meshgrid (squeeze (x(1,:,1)), sy(i), squeeze (z(1,1,:)));
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diff changeset
162 vy = squeeze (interp3 (x, y, z, v, xi, yi, zi, method));
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diff changeset
163 htmp(sidx++) = surface (squeeze (xi),
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164 squeeze (sy(i) * ones (size (zi))),
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165 squeeze (zi), vy);
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166 endfor
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167 endif
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168
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diff changeset
169 if (length (sx) > 0)
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diff changeset
170 for i = length (sx):-1:1
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diff changeset
171 [xi, yi, zi] = meshgrid (sx(i), squeeze (y(:,1,1)), squeeze (z(1,1,:)));
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diff changeset
172 vx = squeeze (interp3 (x, y, z, v, xi, yi, zi, method));
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diff changeset
173 htmp(sidx++) = surface (squeeze (sx(i) * ones (size (zi))),
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diff changeset
174 squeeze (yi), squeeze(zi), vx);
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diff changeset
175 endfor
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176 endif
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177 else
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diff changeset
178 vi = interp3 (x, y, z, v, sx, sy, sz);
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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179 htmp = surface (sx, sy, sz, vi);
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180 endif
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181
17077
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diff changeset
182 if (! ishold ())
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diff changeset
183 set (hax, "view", [-37.5, 30.0], "box", "off",
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diff changeset
184 "xgrid", "on", "ygrid", "on", "zgrid", "on");
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185 endif
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186
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diff changeset
187 unwind_protect_cleanup
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diff changeset
188 if (! isempty (oldfig))
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diff changeset
189 set (0, "currentfigure", oldfig);
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190 endif
17077
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diff changeset
191 end_unwind_protect
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diff changeset
192
c0be321eb472 [project @ 2007-11-26 18:31:53 by jwe]
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diff changeset
193 if (nargout > 0)
17077
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diff changeset
194 h = htmp;
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195 endif
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196
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197 endfunction
7245
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198
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diff changeset
199
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diff changeset
200 %!demo
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201 %! clf;
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202 %! colormap ('default');
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203 %! [x, y, z] = meshgrid (linspace (-8, 8, 32));
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204 %! v = sin (sqrt (x.^2 + y.^2 + z.^2)) ./ (sqrt (x.^2 + y.^2 + z.^2));
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205 %! slice (x, y, z, v, [], 0, []);
14001
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diff changeset
206
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diff changeset
207 %!demo
14237
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diff changeset
208 %! clf;
14247
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diff changeset
209 %! colormap ('default');
14086
41511cce0488 test: Fix 2nd demo for slice() (bug #35143)
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parents: 14001
diff changeset
210 %! [x, y, z] = meshgrid (linspace (-8, 8, 32));
41511cce0488 test: Fix 2nd demo for slice() (bug #35143)
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parents: 14001
diff changeset
211 %! v = sin (sqrt (x.^2 + y.^2 + z.^2)) ./ (sqrt (x.^2 + y.^2 + z.^2));
7245
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diff changeset
212 %! [xi, yi] = meshgrid (linspace (-7, 7));
d65670971cbc [project @ 2007-12-04 03:03:54 by jwe]
jwe
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diff changeset
213 %! zi = xi + yi;
d65670971cbc [project @ 2007-12-04 03:03:54 by jwe]
jwe
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diff changeset
214 %! slice (x, y, z, v, xi, yi, zi);
14001
5f0bb45e615c doc: Update documentation for functions returning a graphics handle h (Bug #34761)
Rik <octave@nomad.inbox5.com>
parents: 11595
diff changeset
215