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...same coordinates and replace those duplicated values with the mean at those coordinates? I've written some cumbersome code that works, but would prefer an efficient R function if it exists. Thanks. -- View this message in context: http://www.nabble.com/How-to-Dedup-a-Spatial-Points-Data-Set-tp25033516p25033516.html Sent from the R help mailing list archive at Nabble.com.