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...r, s should be less and c greater than normalization2, but both s and c change in 1 direstion. Is this possible or am I doing something wrong? Thank you in advance. -- View this message in context: http://r.789695.n4.nabble.com/Sum-of-sd-between-matrix-cols-vs-spearman-correlation-between-them-tp4535057p4535057.html Sent from the R help mailing list archive at Nabble.com.

I have data that looks like this: > df1 group id 1 red A 2 red B 3 red C 4 blue D 5 blue E 6 blue F I want a list of the groups containing vectors with the ids. I am avoiding subset(), as it is only recommended for interactive use. Here's what I have so far: df1 <- data.frame(group=c("red", "red", "red", "blue",