RE: [R] R annoyances

From: Chalasani, Prasad <>
Date: Fri 20 May 2005 - 01:02:59 EST

Thanks all for pointing out that I can use


-----Original Message-----
From: Uwe Ligges [] Sent: Thursday, May 19, 2005 10:49 AM
To: Chalasani, Prasad
Subject: Re: [R] R annoyances

Chalasani, Prasad wrote:
> 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))

I'd rather type


> (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]".

The docs suggest:

   mtx[ , 1, drop = FALSE]

Uwe Ligges

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> mailing list PLEASE do read the posting guide! Received on Fri May 20 01:24:01 2005

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