<div>Dear all,</div>
<div> </div>
<div>Just suppose I have a very large - and irregular - region, and that I am running r.neighbors</div>
<div>to compute some moving windows stats. As my region is irregular, many of central</div>
<div>pixels will be NULL. If I use r.mask, it means that when I run r.neighbours the </div>
<div>processing will be faster than when I not set r.mask (supposing that the north, south, west and east</div>
<div>will be the same on both case)?</div>
<div> </div>
<div>bests</div>
<div> </div>
<div>milton</div>
<div>brazil=toronto</div>