Problem: using cor.test with by( )
On Sun, Mar 30, 2008 at 7:11 PM, Che-hsu (Joe) Chang <chjchang at gmail.com> wrote:
Basically, I want to calculate the correlation between variable A and B for every subject in my study. (yep, that simple) What I did is this: by(data, id, function (x) cor.test(A,B, data=x))
This recent thread [1] might prove of interest. Liviu [1] http://www.nabble.com/p-value-in-Spearman-rank-order-tt15738907.html