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annotate scripts/plot/quiver3.m @ 17301:68bcac3c043a

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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
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rev   line source
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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
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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} {} quiver3 (@var{u}, @var{v}, @var{w})
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21 ## @deftypefnx {Function File} {} quiver3 (@var{x}, @var{y}, @var{z}, @var{u}, @var{v}, @var{w})
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22 ## @deftypefnx {Function File} {} quiver3 (@dots{}, @var{s})
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23 ## @deftypefnx {Function File} {} quiver3 (@dots{}, @var{style})
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24 ## @deftypefnx {Function File} {} quiver3 (@dots{}, "filled")
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25 ## @deftypefnx {Function File} {} quiver3 (@var{hax}, @dots{})
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26 ## @deftypefnx {Function File} {@var{h} =} quiver3 (@dots{})
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27 ##
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28 ## Plot the (@var{u}, @var{v}, @var{w}) components of a vector field in
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29 ## an (@var{x}, @var{y}, @var{z}) meshgrid. If the grid is uniform, you
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30 ## can specify @var{x}, @var{y}, and @var{z} as vectors.
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31 ##
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32 ## If @var{x}, @var{y}, and @var{z} are undefined they are assumed to be
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33 ## @code{(1:@var{m}, 1:@var{n}, 1:@var{p})} where @code{[@var{m}, @var{n}] =
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34 ## size (@var{u})} and @code{@var{p} = max (size (@var{w}))}.
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35 ##
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36 ## The variable @var{s} is a scalar defining a scaling factor to use for
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37 ## the arrows of the field relative to the mesh spacing. A value of 0
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38 ## disables all scaling. The default value is 1.
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39 ##
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40 ## The style to use for the plot can be defined with a line style @var{style}
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41 ## of the same format as the @code{plot} command.
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42 ## If a marker is specified then markers at the grid points of the vectors are
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43 ## drawn rather than arrows. If the argument @qcode{"filled"} is given then the
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44 ## markers are filled.
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45 ##
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46 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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47 ## rather than the current axes returned by @code{gca}.
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48 ##
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49 ## The optional return value @var{h} is a graphics handle to a quiver object.
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50 ## A quiver object regroups the components of the quiver plot (body, arrow,
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51 ## and marker), and allows them to be changed together.
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52 ##
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53 ## @example
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54 ## @group
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55 ## [x, y, z] = peaks (25);
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56 ## surf (x, y, z);
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57 ## hold on;
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58 ## [u, v, w] = surfnorm (x, y, z / 10);
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59 ## h = quiver3 (x, y, z, u, v, w);
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60 ## set (h, "maxheadsize", 0.33);
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61 ## @end group
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62 ## @end example
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63 ##
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64 ## @seealso{quiver, compass, feather, plot}
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65 ## @end deftypefn
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66
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67 function retval = quiver3 (varargin)
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68
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69 [hax, varargin, nargin] = __plt_get_axis_arg__ ("quiver3", varargin{:});
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70
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71 if (nargin < 2)
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72 print_usage ();
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73 else
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74 oldfig = [];
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75 if (! isempty (hax))
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76 oldfig = get (0, "currentfigure");
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77 endif
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78 unwind_protect
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79 hax = newplot (hax);
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80 htmp = __quiver__ (hax, true, varargin{:});
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81
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82 if (! ishold (hax))
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83 set (hax, "view", [-37.5, 30]); # 3D view
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84 endif
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85 unwind_protect_cleanup
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86 if (! isempty (oldfig))
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87 set (0, "currentfigure", oldfig);
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88 endif
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89 end_unwind_protect
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90 endif
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91
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92 if (nargout > 0)
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93 retval = htmp;
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94 endif
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95
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96 endfunction
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97
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98
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99 %!demo
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100 %! clf;
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101 %! colormap ('default');
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102 %! [x,y] = meshgrid (-1:0.1:1);
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103 %! z = sin (2*pi * sqrt (x.^2 + y.^2));
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104 %! theta = 2*pi * sqrt (x.^2 + y.^2) + pi/2;
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105 %! mesh (x, y, z);
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106 %! hold on;
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107 %! quiver3 (x, y, z, sin (theta), cos (theta), ones (size (z)));
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108 %! hold off;
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109
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110 %!demo
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111 %! clf;
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112 %! colormap ('default');
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113 %! [x, y, z] = peaks (25);
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114 %! surf (x, y, z);
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115 %! hold on;
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116 %! [u, v, w] = surfnorm (x, y, z / 10);
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117 %! h = quiver3 (x, y, z, u, v, w);
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118 %! set (h, 'maxheadsize', 0.33);
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119 %! hold off;
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parents: 8253
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665b264b6a50 Compatible support of figure paper properties and resolution for the gnuplot backend.
Ben Abbott <bpabbott@mac.com>
parents: 8253
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121 %!demo
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
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122 %! clf;
14247
c4fa5e0b6193 test: Make surface demos reproducible by setting colormap to default at start of demo.
Rik <octave@nomad.inbox5.com>
parents: 14245
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123 %! colormap ('default');
14092
22c50cbad2ce Add clf() to all plot demos.
Ben Abbott <bpabbott@mac.com>
parents: 14001
diff changeset
124 %! [x, y, z] = peaks (25);
22c50cbad2ce Add clf() to all plot demos.
Ben Abbott <bpabbott@mac.com>
parents: 14001
diff changeset
125 %! surf (x, y, z);
22c50cbad2ce Add clf() to all plot demos.
Ben Abbott <bpabbott@mac.com>
parents: 14001
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126 %! hold on;
22c50cbad2ce Add clf() to all plot demos.
Ben Abbott <bpabbott@mac.com>
parents: 14001
diff changeset
127 %! [u, v, w] = surfnorm (x, y, z / 10);
22c50cbad2ce Add clf() to all plot demos.
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parents: 14001
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128 %! h = quiver3 (x, y, z, u, v, w);
14245
4506eade9f04 Use Matlab coding conventions for demos in plot/ directory.
Rik <octave@nomad.inbox5.com>
parents: 14237
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129 %! set (h, 'maxheadsize', 0.33);
14092
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Ben Abbott <bpabbott@mac.com>
parents: 14001
diff changeset
130 %! hold off;
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
131 %! shading interp;
8889
665b264b6a50 Compatible support of figure paper properties and resolution for the gnuplot backend.
Ben Abbott <bpabbott@mac.com>
parents: 8253
diff changeset
132