Mercurial > octave
view scripts/sparse/spy.m @ 28240:2fb684dc2ec2
axis.m: Implement "fill" option for Matlab compatibility.
* axis.m: Document that "fill" is a synonym for "normal". Place "vis3d" option
in documentation table for modes which affect aspect ratio. Add
strcmpi (opt, "fill") to decode opt and executed the same behavior as "normal".
author | Rik <rik@octave.org> |
---|---|
date | Fri, 24 Apr 2020 13:16:09 -0700 |
parents | bd51beb6205e |
children | 69bd3e52d0b8 0a5b15007766 |
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######################################################################## ## ## Copyright (C) 1998-2020 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave is free software: you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} spy (@var{x}) ## @deftypefnx {} {} spy (@dots{}, @var{markersize}) ## @deftypefnx {} {} spy (@dots{}, @var{line_spec}) ## Plot the sparsity pattern of the sparse matrix @var{x}. ## ## If the argument @var{markersize} is given as a scalar value, it is used to ## determine the point size in the plot. ## ## If the string @var{line_spec} is given it is passed to @code{plot} and ## determines the appearance of the plot. ## @seealso{plot, gplot} ## @end deftypefn function spy (x, varargin) if (nargin < 1) print_usage (); endif markersize = NaN; if (nnz (x) < 1000) line_spec = "*"; else line_spec = "."; endif for i = 1:length (varargin) if (ischar (varargin{i})) if (length (varargin{i}) == 1) line_spec = [line_spec, varargin{i}]; else line_spec = varargin{i}; endif elseif (isscalar (varargin{i})) markersize = varargin{i}; else error ("spy: expected markersize or linespec"); endif endfor [i, j, s] = find (x); [m, n] = size (x); if (isnan (markersize)) plot (j, i, line_spec); else plot (j, i, line_spec, "markersize", markersize); endif axis ([0, n+1, 0, m+1], "ij"); endfunction %!demo %! clf; %! spy (sprand (10,10, 0.2)); ## Mark graphical function as tested by demo block %!assert (1)