octave-nkf: scripts/plot/draw/contourc.m annotate

annotate scripts/plot/draw/contourc.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/contourc.m@56e72e8d1aba
children	d63878346099

rev	line source
14138 72c96de7a403 maint: update copyright notices for 2012 John W. Eaton <jwe@octave.org> parents: 11587 diff changeset	1 ## Copyright (C) 2003-2012 Shai Ayal
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	2 ##
6440 98ee80702bca [project @ 2007-03-23 15:13:19 by jwe] jwe parents: 6269 diff changeset	3 ## This file is part of Octave.
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe] jwe parents: 6269 diff changeset	4 ##
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe] jwe parents: 6269 diff changeset	5 ## Octave is free software; you can redistribute it and/or modify it
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	6 ## under the terms of the GNU General Public License as published by
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6895 diff changeset	7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6895 diff changeset	8 ## your option) any later version.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	9 ##
6440 98ee80702bca [project @ 2007-03-23 15:13:19 by jwe] jwe parents: 6269 diff changeset	10 ## Octave is distributed in the hope that it will be useful, but
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	13 ## General Public License for more details.
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	14 ##
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	15 ## You should have received a copy of the GNU General Public License
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6895 diff changeset	16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6895 diff changeset	17 ## <http://www.gnu.org/licenses/>.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	18
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	19 ## -- texinfo --
16814 64e7bb01fce2 doc: Improve documentation for 2-D plot functions Rik <rik@octave.org> parents: 14872 diff changeset	20 ## @deftypefn {Function File} {[@var{c}, @var{lev}] =} contourc (@var{z})
64e7bb01fce2 doc: Improve documentation for 2-D plot functions Rik <rik@octave.org> parents: 14872 diff changeset	21 ## @deftypefnx {Function File} {[@var{c}, @var{lev}] =} contourc (@var{z}, @var{vn})
64e7bb01fce2 doc: Improve documentation for 2-D plot functions Rik <rik@octave.org> parents: 14872 diff changeset	22 ## @deftypefnx {Function File} {[@var{c}, @var{lev}] =} contourc (@var{x}, @var{y}, @var{z})
64e7bb01fce2 doc: Improve documentation for 2-D plot functions Rik <rik@octave.org> parents: 14872 diff changeset	23 ## @deftypefnx {Function File} {[@var{c}, @var{lev}] =} contourc (@var{x}, @var{y}, @var{z}, @var{vn})
17122 eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	24 ## Compute contour lines (isolines of constant Z value).
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	25 ##
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	26 ## The matrix @var{z} contains height values above the rectangular grid
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	27 ## determined by @var{x} and @var{y}. If only a single input @var{z} is
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	28 ## provided then @var{x} is taken to be @code{1:rows (@var{z})} and @var{y} is
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	29 ## taken to be @code{1:columns (@var{z})}.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	30 ##
17122 eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	31 ## The optional input @var{vn} is either a scalar denoting the number of
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	32 ## contour lines to compute or a vector containing the Z values where lines
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	33 ## will be computed. When @var{vn} is a vector the number of contour lines
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	34 ## is @code{numel (@var{vn})}. However, to compute a single contour line
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	35 ## at a given value use @code{@var{vn} = [val, val]}. If @var{vn} is omitted
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	36 ## it defaults to 10.
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	37 ##
16814 64e7bb01fce2 doc: Improve documentation for 2-D plot functions Rik <rik@octave.org> parents: 14872 diff changeset	38 ## The return value @var{c} is a 2x@var{n} matrix containing the
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	39 ## contour lines in the following format
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	40 ##
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	41 ## @example
9051 1bf0ce0930be Grammar check TexInfo in all .m files Rik <rdrider0-list@yahoo.com> parents: 9040 diff changeset	42 ## @group
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	43 ## @var{c} = [lev1, x1, x2, @dots{}, levn, x1, x2, ...
9040 dbd0c77e575e Cleanup documentation file plot.texi Rik <rdrider0-list@yahoo.com> parents: 8920 diff changeset	44 ## len1, y1, y2, @dots{}, lenn, y1, y2, @dots{}]
9051 1bf0ce0930be Grammar check TexInfo in all .m files Rik <rdrider0-list@yahoo.com> parents: 9040 diff changeset	45 ## @end group
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	46 ## @end example
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	47 ##
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	48 ## @noindent
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	49 ## in which contour line @var{n} has a level (height) of @var{levn} and
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	50 ## length of @var{lenn}.
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	51 ##
17122 eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	52 ## The optional return value @var{lev} is a vector with the Z values of
eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	53 ## of the contour levels.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	54 ##
17122 eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	55 ## Example:
10846 a4f482e66b65 Grammarcheck more of the documentation. Rik <octave@nomad.inbox5.com> parents: 10821 diff changeset	56 ##
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	57 ## @example
6592 8899e24ae362 [project @ 2007-04-27 04:11:48 by jwe] jwe parents: 6590 diff changeset	58 ## @group
8899e24ae362 [project @ 2007-04-27 04:11:48 by jwe] jwe parents: 6590 diff changeset	59 ## x = 0:2;
8899e24ae362 [project @ 2007-04-27 04:11:48 by jwe] jwe parents: 6590 diff changeset	60 ## y = x;
8899e24ae362 [project @ 2007-04-27 04:11:48 by jwe] jwe parents: 6590 diff changeset	61 ## z = x' * y;
8899e24ae362 [project @ 2007-04-27 04:11:48 by jwe] jwe parents: 6590 diff changeset	62 ## contourc (x, y, z, 2:3)
14327 4d917a6a858b doc: Use Octave coding conventions in @example blocks of docstrings. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	63 ## @result{} 2.0000 2.0000 1.0000 3.0000 1.5000 2.0000
4d917a6a858b doc: Use Octave coding conventions in @example blocks of docstrings. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	64 ## 2.0000 1.0000 2.0000 2.0000 2.0000 1.5000
6592 8899e24ae362 [project @ 2007-04-27 04:11:48 by jwe] jwe parents: 6590 diff changeset	65 ## @end group
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	66 ## @end example
17122 eaab03308c0b doc: Rewrite docstrings for most plot functions. Rik <rik@octave.org> parents: 16814 diff changeset	67 ## @seealso{contour, contourf, contour3, clabel}
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	68 ## @end deftypefn
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	69
7327 9af6f0a214ee [project @ 2007-12-19 21:39:02 by jwe] jwe parents: 7245 diff changeset	70 ## Author: Shai Ayal <shaiay@users.sourceforge.net>
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	71
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	72 function [c, lev] = contourc (varargin)
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	73
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	74 if (nargin < 1 \|\| nargin > 4)
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	75 print_usage ();
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	76 endif
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	77
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	78 if (nargin == 1)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	79 z = varargin{1};
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	80 x = 1:columns (z);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	81 y = 1:rows (z);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	82 vn = 10;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	83 elseif (nargin == 2)
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	84 z = varargin{1};
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	85 x = 1:columns (z);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	86 y = 1:rows (z);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	87 vn = varargin{2};
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	88 elseif (nargin == 3)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	89 x = varargin{1};
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	90 y = varargin{2};
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	91 z = varargin{3};
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	92 vn = 10;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	93 elseif (nargin == 4)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	94 x = varargin{1};
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	95 y = varargin{2};
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	96 z = varargin{3};
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	97 vn = varargin{4};
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	98 endif
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	99
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	100 if (! ismatrix (z) \|\| ! ismatrix (x) \|\| ! ismatrix (y))
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	101 error ("contourc: X, Y, and Z must be matrices");
10634 60542efcfa2c Check input arguments for size and type (bug #29861). Rik <octave@nomad.inbox5.com> parents: 9758 diff changeset	102 endif
60542efcfa2c Check input arguments for size and type (bug #29861). Rik <octave@nomad.inbox5.com> parents: 9758 diff changeset	103
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	104 if (isscalar (vn))
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	105 vv = linspace (min (z(:)), max (z(:)), vn+2)(2:end-1);
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	106 else
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	107 vv = unique (sort (vn));
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	108 endif
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	109
7327 9af6f0a214ee [project @ 2007-12-19 21:39:02 by jwe] jwe parents: 7245 diff changeset	110 if (isvector (x) && isvector (y))
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	111 cdat = __contourc__ (x(:)', y(:)', z, vv);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	112 elseif (! any (bsxfun (@minus, x, x(1,:))(:))
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	113 && ! any (bsxfun (@minus, y, y(:,1))(:)))
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	114 ## x,y are uniform grid (such as from meshgrid)
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	115 cdat = __contourc__ (x(1,:), y(:,1)', z, vv);
7327 9af6f0a214ee [project @ 2007-12-19 21:39:02 by jwe] jwe parents: 7245 diff changeset	116 else
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	117 ## Data is sampled over non-uniform mesh.
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	118 ## Algorithm calculates contours for uniform grid
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	119 ## and then interpolates values back to the non-uniform mesh.
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	120
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	121 ## Uniform grid for __contourc__.
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	122 [nr, nc] = size (z);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	123 ii = 1:nc;
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	124 jj = 1:nr;
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	125
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	126 cdat = __contourc__ (ii, jj, z, vv);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	127
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	128 ## Map the contour lines from index space (i,j)
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	129 ## back to the original grid (x,y)
7327 9af6f0a214ee [project @ 2007-12-19 21:39:02 by jwe] jwe parents: 7245 diff changeset	130 i = 1;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	131
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	132 while (i < columns (cdat))
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	133 clen = cdat(2, i);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	134 idx = i + (1:clen);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	135
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	136 ci = cdat(1, idx);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	137 cj = cdat(2, idx);
7327 9af6f0a214ee [project @ 2007-12-19 21:39:02 by jwe] jwe parents: 7245 diff changeset	138
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	139 ## Due to rounding errors, some elements of ci and cj
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	140 ## can fall out of the range of ii and jj and
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	141 ## interp2 would return NA for those values.
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	142 ## The permitted range is enforced here:
c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	143
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	144 ci = max (ci, 1); ci = min (ci, nc);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	145 cj = max (cj, 1); cj = min (cj, nr);
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	146
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	147 cdat(1, idx) = interp2 (ii, jj, x, ci, cj);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	148 cdat(2, idx) = interp2 (ii, jj, y, ci, cj);
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	149
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	150 i += clen + 1;
7327 9af6f0a214ee [project @ 2007-12-19 21:39:02 by jwe] jwe parents: 7245 diff changeset	151 endwhile
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	152 endif
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	153
8236 7799d8c38312 Small plotting fixes David Bateman <dbateman@free.fr> parents: 7327 diff changeset	154 if (nargout > 0)
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	155 c = cdat;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	156 lev = vv;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	157 endif
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	158
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	159 endfunction
7245 d65670971cbc [project @ 2007-12-04 03:03:54 by jwe] jwe parents: 7017 diff changeset	160
14363 f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14327 diff changeset	161
8790 a013ff655ca4 Trivial changes to demos to produce a more pleasant output for octave+gnuplot+aquaterm. Ben Abbott <bpabbott@mac.com> parents: 8325 diff changeset	162 %!test
7245 d65670971cbc [project @ 2007-12-04 03:03:54 by jwe] jwe parents: 7017 diff changeset	163 %! x = 0:2;
d65670971cbc [project @ 2007-12-04 03:03:54 by jwe] jwe parents: 7017 diff changeset	164 %! y = x;
d65670971cbc [project @ 2007-12-04 03:03:54 by jwe] jwe parents: 7017 diff changeset	165 %! z = x' * y;
17451 56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	166 %! c_exp = [2, 1, 1, 2, 2, 3, 1.5, 2; 4, 2, 2, 1, 1, 2, 2, 1.5];
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	167 %! lev_exp = [2 3];
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	168 %! [c_obs, lev_obs] = contourc (x, y, z, 2:3);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	169 %! assert (c_obs, c_exp, eps);
56e72e8d1aba contourc.m: Code special case for meshgrid input (30X performance increase). Rik <rik@octave.org> parents: 17122 diff changeset	170 %! assert (lev_obs, lev_exp, eps);
8790 a013ff655ca4 Trivial changes to demos to produce a more pleasant output for octave+gnuplot+aquaterm. Ben Abbott <bpabbott@mac.com> parents: 8325 diff changeset	171

Mercurial > octave-nkf

annotate scripts/plot/draw/contourc.m @ 17572:7bb76a22cde1