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rodata
2007 Oct 12
1
Addition operation based on specific columns and rows of two data frames
#Hello,
# I have a question about the addition of values in specific columns and
rows of a Data frame.
# Below I have created two data frames, X.df and "Y.df".
## creation of X.df data frame
X<- matrix(0,16,3)
X.df<-data.frame(X)
X.df[,1] <- c(1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4)
X.df[,2] <- c(1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4)
names(X.df)[1]<-"L(A)a(i)"