I'm trying to summarize irregularly spaced data (in data.frame with x,y,z) and need to sum (not average as the as.image() function in fields does) and I'm not sure if there is a function in on of the packages or if I'm going to need to string a few functions together like fields::as.image() and fields::image.count() to get what I need or if I should simply write my own. suggestions? -- Jeff D. Hamann Forest Informatics, Inc. PO Box 1421 Corvallis, Oregon 97339-1421 phone 541-754-1428 fax 541-752-0288 jeff.hamann at forestinformatics.com http://www.forestinformatics.com