RE: [R] 2 simple questions

From: Berton Gunter <gunter.berton_at_gene.com>
Date: Sat 07 May 2005 - 01:31:40 EST


Your questions are confusing because you don't seem to understand R's basic data structures and manipulations. Please read the "Introduction to R" manual and appropriate portions of the R languuage definition before posting.

"The business of the statistician is to catalyze the scientific learning process." - George E. P. Box    

> -----Original Message-----
> From: r-help-bounces@stat.math.ethz.ch
> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of sms13+@pitt.edu
> Sent: Friday, May 06, 2005 8:08 AM
> To: r-help@stat.math.ethz.ch
> Subject: [R] 2 simple questions
>
> Please excuse what I'm sure are very easy questions but I'm
> relatively new
> to the R environment.
> How can I view a range of list elements, but not all. e.g.,
> I had a matrix
> of patients and then split them out by patient id. I know I can do

> patlist[[1]] to see the first one, but how can I view, say,
> the first ten
> patients?
>
> My other question is how to count how many patients have a
> record in which
> a certain condition holds. E.g., I was trying something like
> this to get a
> count:
> ctr<-0
> temp<-lapply(mylist, function(x){is.na(x$date1[1]) &
> !is.na(x$date2[1]))
> ctr<-ctr+1})
>
> But I don't think that's working correctly.
>
> Thanks,
> Steven
>
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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 Received on Sat May 07 01:48:50 2005

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