Hi all, I am a green hand for ENVI and IDL. My problem is that I am using s06av95a_envi.sli spectral library (a resampled library for AVIRIS sensor from splib06 file) to analyze my endmembers. But not all spectra in that library file have reflectance data in all bands from 0.4 to 2.5 micrometers. Instead, a lot of spectra just have values in a subset of that region and have a '*' in other bands. After I used SAM classification, all the materials with missing data would have a score of zero due to '*'. So, I want to know how to adjust this library file. Could I simply replace '*' with zero? Otherwise, is there any better method to compare endmembers with spectra in this kind of library? Any feedback will be very appreciated. Thanks in advance, Lin