The tools (BuildTimeSeries etc) for handling time series of image data in ENVI is very useful, but is there any suitable IDL/ENVI code for trend analysis of image data (i.e. determining the trend for each pixel in a time series of images)? The Mann-Kendall statistics to determine if there is a significant trend and the Theil-Sen slope estimator to estimate the slope of the trend is often suggest and te one I like to use. I tried to find such code for IDL/ENVI, without success. Any suggestion where such code can be found? Seems reasonable to me that such code is a part of ENVI. Thanks /Jonas