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...f" values. Is there a way to either convert the zeros in the matrix to NAs, or only perform the calculations if not zero (i.e. like using something similar to an !all(is.na() construct)? Thanks, rcoder -- View this message in context: http://www.nabble.com/ignoring-zeros-or-converting-to-NA-tp18948979p18948979.html Sent from the R help mailing list archive at Nabble.com.