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annotate scripts/plot/draw/slice.m @ 21530:7c143e73e921

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doc: Don't create end-of-sentence period with "etc." in Texinfo. * external.txi, genpropdoc.m, oop.txi, strread.m, slice.m: Use "@:" following "etc." to create a period which does not end the sentence.
author Rik <rik@octave.org>
date Thu, 24 Mar 2016 15:45:11 -0700
parents 516bb87ea72e
children 1c4cd12987f5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 2007-2015 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 {} {} slice (@var{x}, @var{y}, @var{z}, @var{v}, @var{sx}, @var{sy}, @var{sz})
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21 ## @deftypefnx {} {} slice (@var{x}, @var{y}, @var{z}, @var{v}, @var{xi}, @var{yi}, @var{zi})
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22 ## @deftypefnx {} {} slice (@var{v}, @var{sx}, @var{sy}, @var{sz})
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23 ## @deftypefnx {} {} slice (@var{v}, @var{xi}, @var{yi}, @var{zi})
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24 ## @deftypefnx {} {} slice (@dots{}, @var{method})
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25 ## @deftypefnx {} {} slice (@var{hax}, @dots{})
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26 ## @deftypefnx {} {@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 array @var{v} represents a scalar value at
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30 ## a location given by the parameters @var{x}, @var{y}, and @var{z}. The
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31 ## parameters @var{x}, @var{x}, and @var{z} are either 3-dimensional arrays of
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32 ## the same size as the array @var{v} in the @qcode{"meshgrid"} format or
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33 ## vectors. The parameters @var{xi}, etc.@: respect a similar format to
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34 ## @var{x}, etc., and they represent the points at which the array @var{vi}
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35 ## is interpolated using interp3. The vectors @var{sx}, @var{sy}, and
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36 ## @var{sz} contain points of orthogonal slices of the respective axes.
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37 ##
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38 ## If @var{x}, @var{y}, @var{z} are omitted, they are assumed to be
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39 ## @code{x = 1:size (@var{v}, 2)}, @code{y = 1:size (@var{v}, 1)} and
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40 ## @code{z = 1:size (@var{v}, 3)}.
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41 ##
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42 ## @var{method} is one of:
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43 ##
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44 ## @table @asis
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45 ## @item @qcode{"nearest"}
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46 ## Return the nearest neighbor.
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47 ##
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48 ## @item @qcode{"linear"}
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49 ## Linear interpolation from nearest neighbors.
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50 ##
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51 ## @item @qcode{"cubic"}
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52 ## Cubic interpolation from four nearest neighbors (not implemented yet).
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53 ##
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54 ## @item @qcode{"spline"}
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55 ## Cubic spline interpolation---smooth first and second derivatives
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56 ## throughout the curve.
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57 ## @end table
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58 ##
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59 ## The default method is @qcode{"linear"}.
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60 ##
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61 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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62 ## rather than the current axes returned by @code{gca}.
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63 ##
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64 ## The optional return value @var{h} is a graphics handle to the created
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65 ## surface object.
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66 ##
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67 ## Examples:
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68 ##
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69 ## @example
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70 ## @group
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71 ## [x, y, z] = meshgrid (linspace (-8, 8, 32));
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72 ## v = sin (sqrt (x.^2 + y.^2 + z.^2)) ./ (sqrt (x.^2 + y.^2 + z.^2));
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73 ## slice (x, y, z, v, [], 0, []);
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74 ##
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75 ## [xi, yi] = meshgrid (linspace (-7, 7));
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76 ## zi = xi + yi;
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77 ## slice (x, y, z, v, xi, yi, zi);
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78 ## @end group
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79 ## @end example
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80 ## @seealso{interp3, surface, pcolor}
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81 ## @end deftypefn
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82
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83 ## Author: Kai Habel <kai.habel@gmx.de>
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84
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85 function h = slice (varargin)
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86
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87 [hax, varargin, nargs] = __plt_get_axis_arg__ ("slice", varargin{:});
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88
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89 method = "linear";
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90
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91 if (ischar (varargin{end}))
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92 method = varargin{end};
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93 nargs -= 1;
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94 endif
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95
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96 if (nargs == 4)
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97 v = varargin{1};
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98 if (ndims (v) != 3)
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99 error ("slice: V must be a 3-dimensional array of values");
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100 endif
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101 [nx, ny, nz] = size (v);
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102 [x, y, z] = meshgrid (1:nx, 1:ny, 1:nz);
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103 sx = varargin{2};
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104 sy = varargin{3};
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105 sz = varargin{4};
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106 elseif (nargs == 7)
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107 v = varargin{4};
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108 if (ndims (v) != 3)
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109 error ("slice: V must be a 3-dimensional array of values");
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110 endif
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111 x = varargin{1};
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112 y = varargin{2};
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113 z = varargin{3};
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114 if (isvector (x) && isvector (y) && isvector (z))
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115 [x, y, z] = meshgrid (x, y, z);
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116 elseif (ndims (x) == 3 && size_equal (x, y, z))
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117 ## Do nothing.
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118 else
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119 error ("slice: X, Y, Z size mismatch");
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120 endif
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121 sx = varargin{5};
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122 sy = varargin{6};
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123 sz = varargin{7};
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124 else
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125 print_usage ();
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126 endif
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127
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128 if (any ([isvector(sx), isvector(sy), isvector(sz)]))
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129 have_sval = true;
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130 elseif (ndims (sx) == 2 && size_equal (sx, sy, sz))
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131 have_sval = false;
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132 else
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133 error ("slice: dimensional mismatch for (XI, YI, ZI) or (SX, SY, SZ)");
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134 endif
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135
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136 oldfig = [];
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137 if (! isempty (hax))
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138 oldfig = get (0, "currentfigure");
87ba70043bfc Don't use ifelse in plot fcns to avoid unnecessary fcn evaluations.
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139 endif
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140 unwind_protect
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141 hax = newplot (hax);
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142
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Rik <rik@octave.org>
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diff changeset
143 sidx = 1;
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
Rik <rik@octave.org>
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diff changeset
144 minv = min (v(:));
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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145 maxv = max (v(:));
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
146 set (hax, "clim", [minv, maxv]);
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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147
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
148 if (have_sval)
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diff changeset
149 ns = length (sx) + length (sy) + length (sz);
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150 hs = zeros (ns,1);
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diff changeset
151 [ny, nx, nz] = size (v);
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152 if (length (sz) > 0)
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153 for i = 1:length (sz)
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154 [xi, yi, zi] = meshgrid (squeeze (x(1,:,1)),
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diff changeset
155 squeeze (y(:,1,1)), sz(i));
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diff changeset
156 vz = squeeze (interp3 (x, y, z, v, xi, yi, zi, method));
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diff changeset
157 htmp(sidx++) = surface (xi, yi, sz(i) * ones (size (yi)), vz);
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diff changeset
158 endfor
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159 endif
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160
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diff changeset
161 if (length (sy) > 0)
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diff changeset
162 for i = length (sy):-1:1
19833
9fc020886ae9 maint: Clean up m-files to follow Octave coding conventions.
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parents: 19697
diff changeset
163 [xi, yi, zi] = meshgrid (squeeze (x(1,:,1)),
9fc020886ae9 maint: Clean up m-files to follow Octave coding conventions.
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164 sy(i),
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diff changeset
165 squeeze (z(1,1,:)));
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166 vy = squeeze (interp3 (x, y, z, v, xi, yi, zi, method));
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
167 htmp(sidx++) = surface (squeeze (xi),
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diff changeset
168 squeeze (sy(i) * ones (size (zi))),
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diff changeset
169 squeeze (zi), vy);
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170 endfor
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diff changeset
171 endif
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172
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diff changeset
173 if (length (sx) > 0)
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diff changeset
174 for i = length (sx):-1:1
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diff changeset
175 [xi, yi, zi] = meshgrid (sx(i), squeeze (y(:,1,1)), squeeze (z(1,1,:)));
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
176 vx = squeeze (interp3 (x, y, z, v, xi, yi, zi, method));
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
177 htmp(sidx++) = surface (squeeze (sx(i) * ones (size (zi))),
17126
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diff changeset
178 squeeze (yi), squeeze(zi), vx);
17077
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diff changeset
179 endfor
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180 endif
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
181 else
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
182 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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diff changeset
183 htmp = surface (sx, sy, sz, vi);
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184 endif
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185
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diff changeset
186 if (! ishold ())
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
187 set (hax, "view", [-37.5, 30.0], "box", "off",
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
188 "xgrid", "on", "ygrid", "on", "zgrid", "on");
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189 endif
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190
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diff changeset
191 unwind_protect_cleanup
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
192 if (! isempty (oldfig))
f8b485d09ac6 ribbon.m, slice.m: Overhaul to use __plt_get_axis_arg__.
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diff changeset
193 set (0, "currentfigure", oldfig);
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194 endif
17077
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diff changeset
195 end_unwind_protect
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diff changeset
196
c0be321eb472 [project @ 2007-11-26 18:31:53 by jwe]
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diff changeset
197 if (nargout > 0)
17077
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diff changeset
198 h = htmp;
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199 endif
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200
7184
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diff changeset
201 endfunction
7245
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diff changeset
202
14001
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diff changeset
203
7245
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diff changeset
204 %!demo
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diff changeset
205 %! clf;
14247
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diff changeset
206 %! colormap ('default');
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207 %! [x, y, z] = meshgrid (linspace (-8, 8, 32));
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diff changeset
208 %! v = sin (sqrt (x.^2 + y.^2 + z.^2)) ./ (sqrt (x.^2 + y.^2 + z.^2));
d65670971cbc [project @ 2007-12-04 03:03:54 by jwe]
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diff changeset
209 %! slice (x, y, z, v, [], 0, []);
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diff changeset
210
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diff changeset
211 %!demo
14237
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diff changeset
212 %! clf;
14247
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parents: 14237
diff changeset
213 %! colormap ('default');
14086
41511cce0488 test: Fix 2nd demo for slice() (bug #35143)
Rik <octave@nomad.inbox5.com>
parents: 14001
diff changeset
214 %! [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
215 %! v = sin (sqrt (x.^2 + y.^2 + z.^2)) ./ (sqrt (x.^2 + y.^2 + z.^2));
7245
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parents: 7184
diff changeset
216 %! [xi, yi] = meshgrid (linspace (-7, 7));
d65670971cbc [project @ 2007-12-04 03:03:54 by jwe]
jwe
parents: 7184
diff changeset
217 %! zi = xi + yi;
d65670971cbc [project @ 2007-12-04 03:03:54 by jwe]
jwe
parents: 7184
diff changeset
218 %! 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
219