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2005 Apr 26
0
Construction of a "mean" contengency table
...{ sDF <- subset(DF, condition) A <- aggregate(sDF, factorlist, FUN) M <- matrix(data=NA, nrow = length(levels(factorlist[[1]])), ncol = length(levels(factorlist[[2]])), dimnames = list(levels(factorlist[[1]]),levels(factorlist[[2]]) ) ) for (i in 1:length(A[,1])) { tPhii <- A$Group.1[i] tAppari <- A$Group.2[i] M[tPhii, tAppari] <- A$pest_max_number[i] } return(M) } _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ DISCLAIMER:\ \ This email is from the Scottish Crop Researc...{{dropped}}