I wrote: > If all rows are in the same "group", rowsum() returns a vector instead of a > (1xN) matrix, contrary to documentation:
Thomas Lumley <[EMAIL PROTECTED]> replied: > Is there a strong preference for changing the function vs changing the > documentation? I could live with it either way, but I will point out that the "Examples" section implies an equivalence between: R> xsum <- rowsum(x, group) and R> xsum2 <- tapply(x, list(group[row(x)], col(x)), sum) R> xsum3 <- aggregate(x, list(group), sum) which is broken by this new behavior; xsum2 and xsum3 are (1xN) matrices. -- -- David Brahm ([EMAIL PROTECTED]) ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-devel