[R] Using a loop to define new variables

[Ivan Calandra]

Hi,

Would this do:
test <- data.frame(a=LETTERS[1:10], x=1:10, y=seq(0.1,1,0.1)) #create 
some data.frame
test$z <- test$x/test$y #add a column
?

HTH,
Ivan

Le 5/28/2010 13:52, Andre Easom a écrit :
> 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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-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
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D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

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