Imputing raster values based on another raster

Discussion created by jproville on Oct 27, 2011

I've got two raster layers to do with a specific crop:
Suitability Index for growing

What I'd like to do is use the suitability layer, which covers the entire globe, to impute the potential yield in places where the crop is not grown. I would do this using the actual yields layer.
I'm thinking that what I need to do is a geographically weighted regression, and fill in the expected values using the output of that. However, I can't use rasters as inputs for the GWR tool and I don't want to convert them to polylines as I would have to make them integer type first and I'd lose all resolution in my data.

Any ideas on how I might proceed?