[R] R annoyances

From: Chalasani, Prasad <prasad.chalasani_at_gs.com>
Date: Fri 20 May 2005 - 00:36:44 EST

Dear R Folks,
I'm a big fan of R, but there are a couple of things that repeatedly annoy me, and I wondered if anyone has neat ways to deal with them.

(a) When using "apply" row-wise to a matrix, it returns

    the results column-wise, and to preserve the original     orientation, I've to do a transpose. E.g. I've to keep     doing a transpose, which I consider to be quite annoying.         

    transformed.mtx <- t(apply( mtx, 1, exp))

(b) When extracting 2 or more columns of a matrix,

    R returns the result as a matrix, BUT when extracting     just one column, it returns a vector/array, rather than     a matrix, so I've to keep doing as.matrix, which is annoying.

        sub.mtx <- as.matrix(mtx[,1])

	Of course I could write a suitable function
		cols <- function(mtx,range) as.matrix(mtx[, range])
	but then I lose the syntactic sugar of being able to say "[,1]".

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 20 00:45:59 2005

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