Thanks Glynn. We'll certainly give it a try. Michael
On 8/3/07 3:18 AM, "Glynn Clements" <[EMAIL PROTECTED]> wrote: > > Michael Barton wrote: > >>>> 1. Is there any speed advantage/disadvantage to using r.mfilter over >>>> r.neighbors? At the moment, because we are trying to get rid of occasional >>>> spikes, I don't think that a weighted mean will give better results than an >>>> unweighted mean. But the only way to get functions like a weighted mean is >>>> to use r.mfilter, so it would be good to know if there are any known >>>> performance hits or if it is faster. >>> >>> r.mfilter currently works with integers. AFAICT, there's no >>> fundamental reason why it can't be upgraded to FP. >> >> Then, as is it won't work for us. If it can be upgraded to integers we can >> try it. > > I've added an FP version, r.mfilter.fp. > > I didn't modify r.mfilter as it turns out that there is some behaviour > which is specific to integer maps, and to the zero-is-null behaviour > of 4.x. It wasn't practical to add support for FP and null values > without breaking compatibility. __________________________________________ Michael Barton, Professor of Anthropology Director of Graduate Studies School of Human Evolution & Social Change Center for Social Dynamics & Complexity Arizona State University phone: 480-965-6213 fax: 480-965-7671 www: http://www.public.asu.edu/~cmbarton _______________________________________________ grass-dev mailing list [email protected] http://grass.itc.it/mailman/listinfo/grass-dev
