[R] Using a loop to define new variables

Gabor Grothendieck ggrothendieck at gmail.com
Fri May 28 14:23:27 CEST 2010

Although you asked for a loop this may be clearer if you just have to
do it once and only have 10 x and 10 y columns.  Here we use the built
in anscombe data frame which has columns x1, x2, x3, x4, y1, y2, y3,

  transform(anscombe, r1 = y1 / x1, r2 = y2 / x2, r3 = y3 / x3, r4 = y4 / x4)

In the future please provide sample data with your posts.

On Fri, May 28, 2010 at 7:52 AM, Andre Easom <AEasom at sportingindex.com> wrote:
> Hi,
> I'm a novice R user, much more used to SAS.  My problem is pretty simple - basically, in a data frame, I have variables named
> x1,....,x10 and y1,...,y10; and I would like to create r1 = x1 / y1 etc
> Apologies if this is way too rudimentary - but I couldn't find any posts online which solve this exact issue.
> Cheers,
> Andre
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