[R-sig-Geo] find raster cells with non-NA values

[Struve,Juliane]

Good morning,

Is 
myraster[values(myraster)!="NA"]

what you are looking for ?

Regards,

Juliane 

Dr. Juliane Struve
Fisheries and Aquatic Sciences
7922 NW 71st Street, Gainesville, FL 32653
352-273-3632 (tel)
352-392-3672 (fax)
email: jstruve at ufl.edu



-----Original Message-----
From: r-sig-geo-bounces at r-project.org [mailto:r-sig-geo-bounces at r-project.org] On Behalf Of jcoyle
Sent: Thursday, October 06, 2011 8:31 AM
To: r-sig-geo at r-project.org
Subject: [R-sig-Geo] find raster cells with non-NA values

I would like to 1) find which cell numbers in a raster have non-NA values so that I can 2) use extract to calculate the variance within a radius of each of these cell centers.  I think I have figured out part 2, but am having trouble with part 1. 

Thanks for you assistance.

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