Hi R experts. how can I average two sets of columns?
dd <- data.frame(b = c("chr2", "chr1", "chrY", "chr13", "chrX"), w=11:15, x = 1:5, y = c(8, 3, 9, 9,7), z = c(1, 1, 1, 2, 8)) expected result for mean(w,x) and mean(y,z) is 1 chr2 6 4.5 2 chr1 7 2 3 chrY 8 5 4 chr13 9 5.5 5 chrX 10 7.5 Yu [[alternative HTML version deleted]]
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