Hi, I would like to run the classification algorithm over the test ROI and not over the whole image. In particular, I am using the SVM using the 'envi_svm_doit'. The SVM is very time consuming if it has to be run over the entire image. I know that there is a 'DIMS' in this function which allows us to introduce a coordinate range within which the classification will be performed, but I would like to know if there is any way to make the algorithm run over a specific roi. Thank you in advance for your help Yasser