[GRASSLIST:3345] RE: r.le.pixel

[Eric G. Miller]

On Mon, Mar 18, 2002 at 07:05:04PM -0700, William L. Baker wrote:
> Hi David,
> 
> I'm the author of r.le.pixel.
> 
> r.le.pixel will leave a null row and
> column when you use a 3x3 window because
> the window starts centered over row 2 and
> column 2.  No value is defined for row 1 and
> column 1, since that pixel would not have the
> full 9 pixels.  The larger the window, the
> larger the null area along the edge. If you
> feel that a calculation should be done even
> though the windows would not be complete,
> you could add rows or columns as needed outside
> the image.  Not sure how to do this in GRASS,
> but it could probably be done.

Just increase the region.  Usually that will work, unless r.le.pixel
uses a raster's window rather than the current window (in which case,
you'll have to generate a new raster with the larger window setting).

-- 
Eric G. Miller <egm2 at jps.net>