Hi, I have an endmember collection I have saved to ascii text file, and want to use that to classify a large number of images by using an IDL script. I am wondering whether someone could provide example code for this please ? Looking in the ENVI reference material, it appears that the use of endmembers involves using the Endmember Collection Widget, but in my case I don't want to have user intervention - just to read in the endmembers from file and run the Maximum Likelihood classification, then save the class statistics to a file. Any pointers appreciated as I am relatively new to both ENVI / IDL. Apologies for cross-posting to both IDL and ENVI forums - I am not sure whether this should be directed to IDL users or to ENVI users. regards David Gobbett