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...for (j in 1:nrow(xk)) { w1[j,] <- abs(x$x1-xk$xk1[j]) w2[j,] <- abs(x$x2-xk$xk2[j]) } Is there a way to do the above calculation without use of a FOR loop? Thank you Derek -- View this message in context: http://www.nabble.com/alternate-methods-to-perform-a-calculation-tf4344469.html#a12376906 Sent from the R help mailing list archive at Nabble.com.