Yes, Eric, that is what it does for a _square_ neighborhood. I am a little confuse about the actual shape of the _circular_ neighborhood.
using your examples: will a 3x3 circular neighborhood look like this:? ---o--- o-X-o ---o--- and a 5x5? ---o-o-o--- o-o-o-o-o o-o-X-o-o o-o-o-o-o ---o-o-o--- maybe now my question is more clear... thanks Carlos On Thu, Feb 21, 2008 at 3:07 PM, Patton, Eric <[EMAIL PROTECTED]> wrote: > >I was thinking about the circular neighborhoods that r.neighbors use. > >How exactly are they shaped? I mean, in a 3x3 window, does the > >circular one looks like a cross? and then it start to look more like a > >circle as the size increases? > > As far as I understand it, > > A 3x3 window would look like this: > > o-o-o > o-X-o > o-o-o > > Where the 'X' is the current cell being processed. Similarly, a 5X5 window > would look like this: > > o-o-o-o-o > o-o-o-o-o > o-o-X-o-o > o-o-o-o-o > o-o-o-o-o > > r.neighbors will perform calculations on all the cells I've marked 'o' and > and > assign the output value to 'X', according to whatever method has been chosen > (i.e., average, median, min, max, etc.). > > ~ Eric. > -- +-----------------------------------------------------------+ Carlos Henrique Grohmann - Guano Geologist M.Sc - Doctorate Student at IGc-USP - Brazil Linux User #89721 - carlos dot grohmann at gmail dot com +-----------------------------------------------------------+ _________________ "Good morning, doctors. I have taken the liberty of removing Windows 95 from my hard drive." --The winning entry in a "What were HAL's first words" contest judged by 2001: A SPACE ODYSSEY creator Arthur C. Clarke Can't stop the signal. _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user