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...trices. The same goes for all other positions of the matrix. If these three matrices are given in separate text files, how can I write code that will get this result I need? Thanks in advance, dxc13 -- View this message in context: http://www.nabble.com/how-to-calculate-means-of-matrix-elements-tp23607694p23607694.html Sent from the R help mailing list archive at Nabble.com.