I am trying to calculate how many pixels are in each class after the classification is done but I don't want to do it for the entire raster. I want do it only for a section of it. When I ran stats and select Spatial Subset and select file it reads the white space as part of the raster (obviously) but I only want to have it calculated for the non rectangular shape that is in the file. The file was created in ArcMap. Basically it is a raster clipped to a shape. When I open it in ENVI it ends up having a white background and so I can't run the stats any more. Is there some solution to that? Thank you