doc: Rewrite docstrings for most plot functions. Emphasize clarity, use common "voice", and increase density of seealso links. * doc/interpreter/plot.txi: Add @findex entries that were in xlim.m * scripts/miscellaneous/getappdata.m scripts/miscellaneous/setappdata.m, scripts/plot/allchild.m, scripts/plot/ancestor.m, scripts/plot/area.m, scripts/plot/axes.m, scripts/plot/axis.m, scripts/plot/bar.m, scripts/plot/barh.m, scripts/plot/box.m, scripts/plot/caxis.m, scripts/plot/cla.m, scripts/plot/clabel.m, scripts/plot/clf.m, scripts/plot/close.m, scripts/plot/closereq.m, scripts/plot/colorbar.m, scripts/plot/comet.m, scripts/plot/comet3.m, scripts/plot/compass.m, scripts/plot/contour.m, scripts/plot/contour3.m, scripts/plot/contourc.m, scripts/plot/contourf.m, scripts/plot/copyobj.m, scripts/plot/cylinder.m, scripts/plot/daspect.m, scripts/plot/diffuse.m, scripts/plot/ellipsoid.m, scripts/plot/errorbar.m, scripts/plot/ezcontour.m, scripts/plot/ezcontourf.m, scripts/plot/ezmesh.m, scripts/plot/ezmeshc.m, scripts/plot/ezplot.m, scripts/plot/ezplot3.m, scripts/plot/ezpolar.m, scripts/plot/ezsurf.m, scripts/plot/ezsurfc.m, scripts/plot/feather.m, scripts/plot/figure.m, scripts/plot/fill.m, scripts/plot/findall.m, scripts/plot/findobj.m, scripts/plot/fplot.m, scripts/plot/gca.m, scripts/plot/gcbf.m, scripts/plot/gcbo.m, scripts/plot/gcf.m, scripts/plot/gco.m, scripts/plot/ginput.m, scripts/plot/graphics_toolkit.m, scripts/plot/grid.m, scripts/plot/gtext.m, scripts/plot/guidata.m, scripts/plot/guihandles.m, scripts/plot/hdl2struct.m, scripts/plot/hggroup.m, scripts/plot/hidden.m, scripts/plot/hist.m, scripts/plot/hold.m, scripts/plot/ishghandle.m, scripts/plot/ishold.m, scripts/plot/isocolors.m, scripts/plot/isprop.m, scripts/plot/legend.m, scripts/plot/line.m, scripts/plot/linkprop.m, scripts/plot/loglog.m, scripts/plot/loglogerr.m, scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshgrid.m, scripts/plot/meshz.m, scripts/plot/newplot.m, scripts/plot/orient.m, scripts/plot/pareto.m, scripts/plot/patch.m, scripts/plot/pcolor.m, scripts/plot/peaks.m, scripts/plot/pie.m, scripts/plot/pie3.m, scripts/plot/plot.m, scripts/plot/plot3.m, scripts/plot/plotmatrix.m, scripts/plot/plotyy.m, scripts/plot/polar.m, scripts/plot/print.m, scripts/plot/quiver.m, scripts/plot/quiver3.m, scripts/plot/rectangle.m, scripts/plot/refresh.m, scripts/plot/refreshdata.m, scripts/plot/ribbon.m, scripts/plot/rose.m, scripts/plot/saveas.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/shading.m, scripts/plot/shg.m, scripts/plot/shrinkfaces.m, scripts/plot/slice.m, scripts/plot/specular.m, scripts/plot/sphere.m, scripts/plot/stairs.m, scripts/plot/stem.m, scripts/plot/stem3.m, scripts/plot/struct2hdl.m, scripts/plot/subplot.m, scripts/plot/surf.m, scripts/plot/surface.m, scripts/plot/surfc.m, scripts/plot/surfl.m, scripts/plot/tetramesh.m, scripts/plot/text.m, scripts/plot/title.m, scripts/plot/trimesh.m, scripts/plot/triplot.m, scripts/plot/trisurf.m, scripts/plot/view.m, scripts/plot/waitbar.m, scripts/plot/waitforbuttonpress.m, scripts/plot/waterfall.m, scripts/plot/whitebg.m, scripts/plot/xlabel.m, scripts/plot/xlim.m, scripts/plot/ylabel.m, scripts/plot/ylim.m, scripts/plot/zlabel.m, scripts/plot/zlim.m: Rewrite docstrings for most plot functions. Emphasize clarity, use common "voice", and increase density of seealso links.

--- a/scripts/plot/contourf.m
+++ b/scripts/plot/contourf.m
@@ -18,39 +18,35 @@
 ## <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn  {Function File} {} contourf (@var{x}, @var{y}, @var{z}, @var{lvl})
-## @deftypefnx {Function File} {} contourf (@var{x}, @var{y}, @var{z}, @var{n})
+## @deftypefn  {Function File} {} contourf (@var{z})
+## @deftypefnx {Function File} {} contourf (@var{z}, @var{vn})
 ## @deftypefnx {Function File} {} contourf (@var{x}, @var{y}, @var{z})
-## @deftypefnx {Function File} {} contourf (@var{z}, @var{n})
-## @deftypefnx {Function File} {} contourf (@var{z}, @var{lvl})
-## @deftypefnx {Function File} {} contourf (@var{z})
-## @deftypefnx {Function File} {} contourf (@dots{}, @var{prop}, @var{val})
+## @deftypefnx {Function File} {} contourf (@var{x}, @var{y}, @var{z}, @var{vn})
+## @deftypefnx {Function File} {} contourf (@dots{}, @var{style})
 ## @deftypefnx {Function File} {} contourf (@var{hax}, @dots{})
 ## @deftypefnx {Function File} {[@var{c}, @var{h}] =} contourf (@dots{})
-## Compute and plot filled contours of the matrix @var{z}.
-## Parameters @var{x}, @var{y} and @var{n} or @var{lvl} are optional.
+## Create a 2-D contour plot with filled intervals.
 ##
-## If @var{x} and @var{y} are omitted they are taken as the row/column
-## indices of @var{z}.  @var{n} is a scalar denoting the number of contour
-## lines to compute.  Alternatively @var{lvl} is a vector containing the
-## contour levels.  If only one value (e.g., lvl0) is desired, set
-## @var{lvl} to [lvl0, lvl0].  If both @var{n} or @var{lvl} are omitted
-## a default value of 10 contour levels is assumed.
+## Plot level curves (contour lines) of the matrix @var{z} and fill the region
+## between lines with colors from the current colormap.
+##
+## The level curves are taken from the contour matrix @var{c} computed by
+## @code{contourc} for the same arguments; see the latter for their
+## interpretation.
 ##
-## The appearance of the plot can be customized by passing
-## property/value pairs to the function. 
+## The appearance of contour lines can be defined with a line style @var{style}
+## in the same manner as @code{plot}.  Only line style and color are used;
+## Any markers defined by @var{style} are ignored.
 ##
-## If provided, the filled contours are added to the axes object
-## @var{hax} instead of the current axis.
+## If the first argument @var{hax} is an axes handle, then plot into this axis,
+## rather than the current axes returned by @code{gca}.
 ##
-## The return value @var{c} is a 2xn matrix containing the contour lines
-## as described in the documentation on the @code{contourc} function.
+## The optional output @var{c} are the contour levels in @code{contourc} format.
 ##
-## The return value @var{h} is handle-vector to the patch objects creating
-## the filled contours.
+## The optional return value @var{h} is a graphics handle to the hggroup
+## comprising the contour lines.
 ##
-## The following example plots filled contours of the @code{peaks}
-## function.
+## The following example plots filled contours of the @code{peaks} function.
 ##
 ## @example
 ## @group
@@ -58,7 +54,7 @@
 ## contourf (x, y, z, -7:9)
 ## @end group
 ## @end example
-## @seealso{contourc, contour, contour3, patch}
+## @seealso{ezcontourf, contour, contourc, contour3, clabel, meshc, surfc, caxis, colormap, plot}
 ## @end deftypefn
 
 ## Author: Kai Habel <kai.habel@gmx.de>