[manual] suggested addition to pcolor description

[Francesco Potorti`]

> > help pcolor
>  -- Function File:  pcolor (X, Y, C)
>  -- Function File:  pcolor (C)
>      Density plot for given matrices X, and Y from `meshgrid' and  a
>      matrix C corresponding to the X and Y coordinates of  the mesh's
>      vertices. If X and Y are vectors, then a typical vertex  is (X(j),
>      Y(i), C(i,j)).  Thus, columns of C  correspond to different X
>      values and rows of C correspond  to different Y values.
>
>      The `colormap' is scaled to the extents of C.   Limits may be
>      placed on the color axis by the  command `caxis', or by setting
>      the `clim' property of the  parent axis.
>
>      The face color of each cell of the mesh is determined by
>      interpolating  the values of C for the cell's vertices. `imagesc'
>      may be used  to set the face color of the cells explicitly.

I do not know whether the last sentence is true.  What I was suggesting
is equivalent to substituting the last sentence with something like:

Contrast this with the behaviour of `imagesc', which plots one cell for
each element of C.

>      `shading' modifies an attribute determining the manner by which the
>      face color of each cell is interpolated from the values of C,  and
>      the visibility of the cells' edges. By default the attribute is
>      "flat", which renders a single color for each cell's face with the
>      edge  visible.

The description is consistent with the behaviour that I observe, but
this means that the default attribute is "interp" (or "faceted", I still
can not understand the difference).

>      See also: caxis, contour, meshgrid, meshsc, shading.

Maybe you meant `imagesc' rather than `meshsc'?

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