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...e equation to be read in and assigned to equation. I know how to do this kind of thing for numerical values but not for logical equations. Anyone can help out? thanks a lot! czqiu -- View this message in context: http://www.nabble.com/how-to-let-R-read-different-equations-I-write-and-execute-it--tp14243817p14243817.html Sent from the R help mailing list archive at Nabble.com.