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diff scripts/plot/ezcontourf.m @ 16993:78f57b14535c

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Overhaul ez* family of plot functions. * scripts/plot/ezcontour.m, scripts/plot/ezcontourf.m, scripts/plot/ezmesh.m, scripts/plot/ezmeshc.m, scripts/plot/ezpolar.m, scripts/plot/ezsurfc.m: Redo docstring. Match function output names to docstring. * scripts/plot/ezplot.m: Add %!demo block with sinc function. Redo docstring. Match function output names to docstring. scripts/plot/ezplot3.m: Add %!demo block showing 'animate' option. Redo docstring. Match function output names to docstring. * scripts/plot/ezsurf.m: Add %!demo block showing 'circ' argument. Redo docstring. Match function output names to docstring. * scripts/plot/private/__ezplot__.m: Implement 'circ' option for ezsurf, ezmesh. Implement 'animate' option for ezplot3. Implement new algorithm for finding valid axis setting for mesh, surf, contour plots based on function gradient. Eliminate complex Z values along with singularities because these are not plottable by mesh, surf. Implement Matlab-compatible 2-pass approach to finding valid domain for plot. Use 500 points for point-style plot functions ezplot, ezplot3, ezpolar rather than previous 60 for a smoother plot. Use better regexprep() calls to format "pretty print" title string. Relax input checking and allow 3rd parametric function to be a function of 1 variable only. Clean up code and use Octave coding conventions.
author Rik <rik@octave.org>
date Wed, 17 Jul 2013 10:09:44 -0700
parents ce2b59a6d0e5
children eaab03308c0b
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line diff
--- a/scripts/plot/ezcontourf.m
+++ b/scripts/plot/ezcontourf.m
@@ -20,23 +20,28 @@
 ## @deftypefn  {Function File} {} ezcontourf (@var{f})
 ## @deftypefnx {Function File} {} ezcontourf (@dots{}, @var{dom})
 ## @deftypefnx {Function File} {} ezcontourf (@dots{}, @var{n})
-## @deftypefnx {Function File} {} ezcontourf (@var{h}, @dots{})
+## @deftypefnx {Function File} {} ezcontourf (@var{hax}, @dots{})
 ## @deftypefnx {Function File} {@var{h} =} ezcontourf (@dots{})
 ##
-## Plot the filled contour lines of a function.  @var{f} is a string, inline
-## function or function handle with two arguments defining the function.  By
-## default the plot is over the domain @code{-2*pi < @var{x} < 2*pi} and
-## @code{-2*pi < @var{y} < 2*pi} with 60 points in each dimension.
+## Plot the filled contour lines of a function.
+## 
+## @var{f} is a string, inline function, or function handle with two arguments
+## defining the function.  By default the plot is over the meshed domain
+## @code{-2*pi <= @var{x} | @var{y} <= 2*pi} with 60 points in each dimension.
 ##
 ## If @var{dom} is a two element vector, it represents the minimum and maximum
-## value of both @var{x} and @var{y}.  If @var{dom} is a four element vector,
-## then the minimum and maximum value of @var{x} and @var{y} are specify
-## separately.
+## values of both @var{x} and @var{y}.  If @var{dom} is a four element vector,
+## then the minimum and maximum values are @code{[xmin xmax ymin ymax]}.
 ##
 ## @var{n} is a scalar defining the number of points to use in each dimension.
 ##
+## If the first argument is an axis handle, @var{hax}, then plot into this
+## axis rather than the current axis handle returned by @code{gca}.
+##
 ## The optional return value @var{h} is a graphics handle to the created plot.
 ##
+## Example:
+##
 ## @example
 ## @group
 ## f = @@(x,y) sqrt (abs (x .* y)) ./ (1 + x.^2 + y.^2);
@@ -44,19 +49,19 @@
 ## @end group
 ## @end example
 ##
-## @seealso{ezplot, ezcontour, ezsurfc, ezmeshc}
+## @seealso{contourf, ezcontour, ezplot, ezmeshc, ezsurfc}
 ## @end deftypefn
 
-function retval = ezcontourf (varargin)
+function h = ezcontourf (varargin)
 
-  [h, needusage] = __ezplot__ ("contourf", varargin{:});
+  [htmp, needusage] = __ezplot__ ("contourf", varargin{:});
 
   if (needusage)
     print_usage ();
   endif
 
   if (nargout > 0)
-    retval = h;
+    h = htmp;
   endif
 
 endfunction