[R] inefficient ifelse() ?
R. Michael Weylandt
michael.weylandt at gmail.com
Wed Mar 28 17:30:35 CEST 2012
Just use a regular if statement:
X <- if(b == "YY") a else substr(a, 1,3)
On Wed, Mar 28, 2012 at 11:19 AM, Manta <mantino84 at libero.it> wrote:
> I have a similar problem. I have a dataset and an element. If the element is
> equal to "YY", I want to take the first column of the dataset, otherwise I
> want to take the second column. The following does not work, as it only
> evaluates the first element. Any idea?
>  "AAAXXX"
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