From: jim holtman <jholtman_at_gmail.com>

Date: Mon 24 Jul 2006 - 19:41:37 EST

Date: Mon 24 Jul 2006 - 19:41:37 EST

for (i in 1:78){

write.table(answer[class == i], paste("answer_",i, ".txt", sep=''))
# if you want the variable

assign(paste("k_", i, sep=''), answer[class == i])
}

On 7/24/06, Chris Kopp <kopp@soz.unibe.ch> wrote:

*>
*

> Dear all

*>
**> The following is a very basic and beginner's question on loops.
**>
**> Suppose you have data (say, 1000 cases) with two variables named
**> "answer" (string) and "class" (numeric). The latter runs from 1 to 78
**> and categorizes the data. I need to create a file "answer_1.txt" for
**> the cases with class==1, and so on, up to "answer_78.txt"
**>
**> I have been able to do this for one value of "class" in the following
**> way
**>
**> k_1<-answer[class==1]
**> write.table(k_1, "answer_1.txt")
**>
**> Now, I would like to loop over "class", replacing the occurences of
**> "1" in the code above successively with the integers from 1 to 78, so
**> that I get my 78 files.
**> (equivalent to typing:
**>
**> k_1<-answer[class==1]
**> write.table(k_1, "answer_1.txt")
**>
**> k_2<-answer[class==2]
**> write.table(k_2, "answer_2.txt")
**>
**> etc.)
**>
**> I have tried
**>
**> for (i in 1:78) k_i<-answer[class==(i)]
**>
**> but this only generated the variable corresponding to the last value
**> (78) of the counter i, and not the files in between.
**>
**> Thanks a lot for any help or pointers in the right direction. I am an
**> R beginner and I studied the help files (they got me up to here), but
**> I could not solve this problem on my own.
**>
**> Chris Kopp
**>
**> ______________________________________________
**> R-help@stat.math.ethz.ch mailing list
**> https://stat.ethz.ch/mailman/listinfo/r-help
**> PLEASE do read the posting guide
**> http://www.R-project.org/posting-guide.html
**> and provide commented, minimal, self-contained, reproducible code.
**>
*

-- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.Received on Mon Jul 24 20:34:14 2006

Archive maintained by Robert King, hosted by
the discipline of
statistics at the
University of Newcastle,
Australia.

Archive generated by hypermail 2.1.8, at Mon 24 Jul 2006 - 22:19:54 EST.

*
Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help.
Please read the posting
guide before posting to the list.
*