I am trying to loop through a number of images (1-band) and over a set of ROIs. I would like to export the pixel values from each ROI to a file for use in another program. I can write the data out using ENVI:ExportROIS, but would like to get the data into an array to add a few things. Here is a short code fragment. ? rast1=e.OpenRaster(files[0]) rois = e.OpenRoi(roifile) numrois = size(rois, /N_ELEMENTS) WHILE(counter LT numrois) DO BEGIN sROIfile = roidatfile+ String(counter, Format='(I3.3)') + '.csv' saveROIfile = FILEPATH(sROIfile, ROOT_DIR = savedir) rast1.ExportROIS, saveROIfile, rois[1], 'CSV' ENDWHILE This produces a file for each ROI with a number of header rows, then the pixel information. Like this: ; Number of ROIs: 1 ; File Dimension: 8001 x 7291 ; ROI name: Emerg01 ; ROI rgb value: {0 128 0} ; ROI npts: 10003 FileX, FileY, MapX, MapY, Lat, Lon, B1 3769, 2675, 347355, 4811865, 43.44413141, -118.8863774, -0.051635 I would like to loop over a number of ROIs, have all the data in one file but with an ROI# associated with each data point. For example, create a file with a single header row and include ROI information. Something like: ROI#, ROIName, FileX, FileY, ... B1 However, I don't know how to get the data from the rast1.ExportROIS command into a 2-d data array. If I could get the data into an array then I could just append a column with the ROI# and write it out. Something like (I know this doesn't work - I just want the data from the ExportROIS property in an array): dataArray = rast1.ExportROIS, ..... I actually want to loop over a number of files and create a single file with data like this: FileName, ROI#, FileX, FileY, .... BD Does anyone have any suggestions? Gus