Mercurial > octave-nkf
comparison scripts/plot/draw/feather.m @ 17572:7bb76a22cde1
maint: Split scripts/plot directory into 4 pieces.
scripts/gui : user-interface functions
scripts/plot/appearance : functions controlling plot appearance
scripts/plot/draw : plotting functions which produce graphs
scripts/plot/util : low-level plotting functions and utilities.
* scripts/gui/guidata.m, scripts/gui/guihandles.m, scripts/gui/module.mk,
scripts/gui/private/__file_filter__.m,
scripts/gui/private/__fltk_file_filter__.m,
scripts/gui/private/__is_function__.m, scripts/gui/private/__uigetdir_fltk__.m,
scripts/gui/private/__uigetfile_fltk__.m,
scripts/gui/private/__uiobject_split_args__.m,
scripts/gui/private/__uiputfile_fltk__.m, scripts/gui/uicontextmenu.m,
scripts/gui/uicontrol.m, scripts/gui/uigetdir.m, scripts/gui/uigetfile.m,
scripts/gui/uimenu.m, scripts/gui/uipanel.m, scripts/gui/uipushtool.m,
scripts/gui/uiputfile.m, scripts/gui/uiresume.m, scripts/gui/uitoggletool.m,
scripts/gui/uitoolbar.m, scripts/gui/uiwait.m, scripts/gui/waitbar.m,
scripts/gui/waitforbuttonpress.m: Moved from scripts/plot to scripts/gui
* scripts/plot/appearance/__clabel__.m,
scripts/plot/appearance/__getlegenddata__.m, scripts/plot/appearance/axis.m,
scripts/plot/appearance/box.m, scripts/plot/appearance/caxis.m,
scripts/plot/appearance/clabel.m, scripts/plot/appearance/daspect.m,
scripts/plot/appearance/diffuse.m, scripts/plot/appearance/grid.m,
scripts/plot/appearance/gtext.m, scripts/plot/appearance/hidden.m,
scripts/plot/appearance/legend.m,
scripts/plot/appearance/orient.m, scripts/plot/appearance/pbaspect.m,
scripts/plot/appearance/private/__axis_label__.m,
scripts/plot/appearance/private/__axis_limits__.m,
scripts/plot/appearance/shading.m, scripts/plot/appearance/specular.m,
scripts/plot/appearance/text.m, scripts/plot/appearance/title.m,
scripts/plot/appearance/view.m, scripts/plot/appearance/whitebg.m,
scripts/plot/appearance/xlabel.m, scripts/plot/appearance/xlim.m,
scripts/plot/appearance/ylabel.m, scripts/plot/appearance/ylim.m,
scripts/plot/appearance/zlabel.m, scripts/plot/appearance/zlim.m:
Moved from scripts/plot to subdir appearance.
* scripts/plot/draw/area.m, scripts/plot/draw/bar.m, scripts/plot/draw/barh.m,
scripts/plot/draw/colorbar.m, scripts/plot/draw/comet.m,
scripts/plot/draw/comet3.m, scripts/plot/draw/compass.m,
scripts/plot/draw/contour.m, scripts/plot/draw/contour3.m,
scripts/plot/draw/contourc.m, scripts/plot/draw/contourf.m,
scripts/plot/draw/cylinder.m, scripts/plot/draw/ellipsoid.m,
scripts/plot/draw/errorbar.m, scripts/plot/draw/ezcontour.m,
scripts/plot/draw/ezcontourf.m, scripts/plot/draw/ezmesh.m,
scripts/plot/draw/ezmeshc.m, scripts/plot/draw/ezplot.m,
scripts/plot/draw/ezplot3.m, scripts/plot/draw/ezpolar.m,
scripts/plot/draw/ezsurf.m, scripts/plot/draw/ezsurfc.m,
scripts/plot/draw/feather.m, scripts/plot/draw/fill.m,
scripts/plot/draw/fplot.m, scripts/plot/draw/hist.m,
scripts/plot/draw/isocolors.m, scripts/plot/draw/isonormals.m,
scripts/plot/draw/isosurface.m, scripts/plot/draw/line.m,
scripts/plot/draw/loglog.m, scripts/plot/draw/loglogerr.m,
scripts/plot/draw/mesh.m, scripts/plot/draw/meshc.m, scripts/plot/draw/meshz.m,
scripts/plot/draw/pareto.m,
scripts/plot/draw/patch.m, scripts/plot/draw/pcolor.m,
scripts/plot/draw/peaks.m, scripts/plot/draw/pie.m, scripts/plot/draw/pie3.m,
scripts/plot/draw/plot.m, scripts/plot/draw/plot3.m,
scripts/plot/draw/plotmatrix.m, scripts/plot/draw/plotyy.m,
scripts/plot/draw/polar.m, scripts/plot/draw/private/__add_datasource__.m,
scripts/plot/draw/private/__bar__.m, scripts/plot/draw/private/__contour__.m,
scripts/plot/draw/private/__errcomm__.m,
scripts/plot/draw/private/__errplot__.m,
scripts/plot/draw/private/__ezplot__.m,
scripts/plot/draw/private/__interp_cube__.m,
scripts/plot/draw/private/__line__.m,
scripts/plot/draw/private/__marching_cube__.m,
scripts/plot/draw/private/__patch__.m, scripts/plot/draw/private/__pie__.m,
scripts/plot/draw/private/__plt__.m, scripts/plot/draw/private/__quiver__.m,
scripts/plot/draw/private/__scatter__.m, scripts/plot/draw/private/__stem__.m,
scripts/plot/draw/quiver.m, scripts/plot/draw/quiver3.m,
scripts/plot/draw/rectangle.m, scripts/plot/draw/ribbon.m,
scripts/plot/draw/rose.m, scripts/plot/draw/scatter.m,
scripts/plot/draw/scatter3.m, scripts/plot/draw/semilogx.m,
scripts/plot/draw/semilogxerr.m, scripts/plot/draw/semilogy.m,
scripts/plot/draw/semilogyerr.m, scripts/plot/draw/shrinkfaces.m,
scripts/plot/draw/slice.m, scripts/plot/draw/sombrero.m,
scripts/plot/draw/sphere.m, scripts/plot/draw/stairs.m,
scripts/plot/draw/stem.m, scripts/plot/draw/stem3.m,
scripts/plot/draw/stemleaf.m, scripts/plot/draw/surf.m,
scripts/plot/draw/surface.m, scripts/plot/draw/surfc.m,
scripts/plot/draw/surfl.m, scripts/plot/draw/surfnorm.m,
scripts/plot/draw/tetramesh.m, scripts/plot/draw/trimesh.m,
scripts/plot/draw/triplot.m, scripts/plot/draw/trisurf.m,
scripts/plot/draw/waterfall.m: Moved from plot/ to subdir draw.
* scripts/plot/util/__actual_axis_position__.m,
scripts/plot/util/__default_plot_options__.m,
scripts/plot/util/__gnuplot_drawnow__.m,
scripts/plot/util/__next_line_color__.m,
scripts/plot/util/__next_line_style__.m,
scripts/plot/util/__plt_get_axis_arg__.m, scripts/plot/util/__pltopt__.m,
scripts/plot/util/allchild.m, scripts/plot/util/ancestor.m,
scripts/plot/util/axes.m, scripts/plot/util/cla.m, scripts/plot/util/clf.m,
scripts/plot/util/close.m, scripts/plot/util/closereq.m,
scripts/plot/util/colstyle.m, scripts/plot/util/copyobj.m,
scripts/plot/util/figure.m, scripts/plot/util/findall.m,
scripts/plot/util/findfigs.m, scripts/plot/util/findobj.m,
scripts/plot/util/gca.m, scripts/plot/util/gcbf.m, scripts/plot/util/gcbo.m,
scripts/plot/util/gcf.m, scripts/plot/util/gco.m, scripts/plot/util/ginput.m,
scripts/plot/util/gnuplot_binary.in, scripts/plot/util/graphics_toolkit.m,
scripts/plot/util/hdl2struct.m, scripts/plot/util/hggroup.m,
scripts/plot/util/hold.m, scripts/plot/util/isaxes.m,
scripts/plot/util/isfigure.m, scripts/plot/util/ishghandle.m,
scripts/plot/util/ishold.m, scripts/plot/util/isprop.m,
scripts/plot/util/linkprop.m, scripts/plot/util/meshgrid.m,
scripts/plot/util/ndgrid.m,
scripts/plot/util/newplot.m, scripts/plot/util/print.m,
scripts/plot/util/printd.m, scripts/plot/util/private/__add_default_menu__.m,
scripts/plot/util/private/__fltk_ginput__.m,
scripts/plot/util/private/__fltk_print__.m,
scripts/plot/util/private/__ghostscript__.m,
scripts/plot/util/private/__gnuplot_get_var__.m,
scripts/plot/util/private/__gnuplot_ginput__.m,
scripts/plot/util/private/__gnuplot_has_feature__.m,
scripts/plot/util/private/__gnuplot_has_terminal__.m,
scripts/plot/util/private/__gnuplot_open_stream__.m,
scripts/plot/util/private/__gnuplot_print__.m,
scripts/plot/util/private/__gnuplot_version__.m,
scripts/plot/util/private/__go_draw_axes__.m,
scripts/plot/util/private/__go_draw_figure__.m,
scripts/plot/util/private/__print_parse_opts__.m,
scripts/plot/util/private/__tight_eps_bbox__.m, scripts/plot/util/refresh.m,
scripts/plot/util/refreshdata.m, scripts/plot/util/saveas.m,
scripts/plot/util/shg.m, scripts/plot/util/struct2hdl.m,
scripts/plot/util/subplot.m: Moved from plot to subdir util.
* etc/HACKING: Updated directory structure info.
* scripts/Makefile.am, scripts/plot/appearance/module.mk,
scripts/plot/draw/module.mk, scripts/plot/util/module.mk:
Added new directories to build system.
author | Rik <rik@octave.org> |
---|---|
date | Fri, 04 Oct 2013 17:09:08 -0700 |
parents | scripts/plot/feather.m@bddb9688e41c |
children | d63878346099 |
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17571:6e4ea5c8a4bb | 17572:7bb76a22cde1 |
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1 ## Copyright (C) 2007-2012 David Bateman | |
2 ## | |
3 ## This file is part of Octave. | |
4 ## | |
5 ## Octave is free software; you can redistribute it and/or modify it | |
6 ## under the terms of the GNU General Public License as published by | |
7 ## the Free Software Foundation; either version 3 of the License, or (at | |
8 ## your option) any later version. | |
9 ## | |
10 ## Octave is distributed in the hope that it will be useful, but | |
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 ## General Public License for more details. | |
14 ## | |
15 ## You should have received a copy of the GNU General Public License | |
16 ## along with Octave; see the file COPYING. If not, see | |
17 ## <http://www.gnu.org/licenses/>. | |
18 | |
19 ## -*- texinfo -*- | |
20 ## @deftypefn {Function File} {} feather (@var{u}, @var{v}) | |
21 ## @deftypefnx {Function File} {} feather (@var{z}) | |
22 ## @deftypefnx {Function File} {} feather (@dots{}, @var{style}) | |
23 ## @deftypefnx {Function File} {} feather (@var{hax}, @dots{}) | |
24 ## @deftypefnx {Function File} {@var{h} =} feather (@dots{}) | |
25 ## | |
26 ## Plot the @code{(@var{u}, @var{v})} components of a vector field emanating | |
27 ## from equidistant points on the x-axis. | |
28 ## | |
29 ## If a single complex argument @var{z} is given, then | |
30 ## @code{@var{u} = real (@var{z})} and @code{@var{v} = imag (@var{z})}. | |
31 ## | |
32 ## The style to use for the plot can be defined with a line style @var{style} | |
33 ## of the same format as the @code{plot} command. | |
34 ## | |
35 ## If the first argument @var{hax} is an axes handle, then plot into this axis, | |
36 ## rather than the current axes returned by @code{gca}. | |
37 ## | |
38 ## The optional return value @var{h} is a vector of graphics handles to the | |
39 ## line objects representing the drawn vectors. | |
40 ## | |
41 ## @example | |
42 ## @group | |
43 ## phi = [0 : 15 : 360] * pi/180; | |
44 ## feather (sin (phi), cos (phi)); | |
45 ## @end group | |
46 ## @end example | |
47 ## | |
48 ## @seealso{plot, quiver, compass} | |
49 ## @end deftypefn | |
50 | |
51 function h = feather (varargin) | |
52 | |
53 [hax, varargin, nargin] = __plt_get_axis_arg__ ("feather", varargin{:}); | |
54 | |
55 if (nargin == 0 || nargin > 3) | |
56 print_usage (); | |
57 endif | |
58 | |
59 if (nargin == 1 || (nargin == 2 && ! isnumeric (varargin{2}))) | |
60 z = varargin{1}(:).'; | |
61 u = real (z); | |
62 v = imag (z); | |
63 have_line_spec = (nargin == 2); | |
64 elseif (nargin >= 2 && isnumeric (varargin{2})) | |
65 ioff = 3; | |
66 u = varargin{1}(:).'; | |
67 v = varargin{2}(:).'; | |
68 have_line_spec = (nargin == 3); | |
69 else | |
70 print_usage (); | |
71 endif | |
72 | |
73 arrowsize = 0.20; | |
74 line_spec = "-b"; | |
75 | |
76 if (have_line_spec) | |
77 arg = varargin{end}; | |
78 if (ischar (arg) || iscellstr (arg)) | |
79 [~, valid] = __pltopt__ ("feather", arg, false); | |
80 if (valid) | |
81 line_spec = arg; | |
82 else | |
83 error ("feather: invalid linestyle STYLE"); | |
84 endif | |
85 else | |
86 error ("feather: invalid linestyle STYLE"); | |
87 endif | |
88 endif | |
89 | |
90 ## Matlab draws feather plots, with the arrow head as one continous | |
91 ## line, and each arrow separately. This is completely different from | |
92 ## quiver and quite ugly. | |
93 n = length (u); | |
94 xend = [1 : n] + u; | |
95 xtmp = [1 : n] + u .* (1 - arrowsize); | |
96 yend = v; | |
97 ytmp = v .* (1 - arrowsize); | |
98 x = [[1 : n]; xend; xtmp - v * arrowsize / 3; xend; ... | |
99 xtmp + v * arrowsize / 3]; | |
100 y = [zeros(1, n); yend; ytmp + u * arrowsize / 3; yend; ... | |
101 ytmp - u * arrowsize / 3]; | |
102 | |
103 oldfig = []; | |
104 if (! isempty (hax)) | |
105 oldfig = get (0, "currentfigure"); | |
106 endif | |
107 unwind_protect | |
108 hax = newplot (hax); | |
109 hlist = plot (x, y, line_spec, [1, n], [0, 0], line_spec); | |
110 unwind_protect_cleanup | |
111 if (! isempty (oldfig)) | |
112 set (0, "currentfigure", oldfig); | |
113 endif | |
114 end_unwind_protect | |
115 | |
116 if (nargout > 0) | |
117 h = hlist; | |
118 endif | |
119 | |
120 endfunction | |
121 | |
122 | |
123 %!demo | |
124 %! clf; | |
125 %! phi = [0 : 15 : 360] * pi/180; | |
126 %! feather (sin (phi), cos (phi)); | |
127 %! axis tight; | |
128 %! title ('feather plot'); | |
129 | |
130 %% Test input validation | |
131 %!error feather () | |
132 %!error feather (1,2,3,4) | |
133 %!error feather (1, "-r", 2) | |
134 %!error <invalid linestyle STYLE> feather (1, "abc") | |
135 %!error <invalid linestyle STYLE> feather (1, {1}) | |
136 |