[R] Using a loop to define new variables

[Ivan Calandra]

Sorry, I should have written it an other way:
test$z <- test[[2]]/test[[3]]

Which is then really easy to fit into a for loop

Ivan

Le 5/28/2010 14:05, Ivan Calandra a écrit :
> 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
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