[R] A. Mani : Tapply

A Mani a.manigs at gmail.com
Thu Aug 25 16:58:47 CEST 2005


Hello,
        Is it safe to use tapply when the result will be of dim 20000
x 10000 or more ? In my PC R crashes. The code used was on a 3-col
data frame with two factor cols and a numeric column. The fn was diff
.
data form being <A, B, Num>
tapply(data$A, list(data$A, data$B), diff)

-- 
A. Mani
Member, Cal. Math. Soc




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