Marino David
2013-Dec-14 21:06 UTC
[R] How to use variables whose names are with number at end in R loop
Hi all:
Assume that I have variables, say v1, v2,...,v100 and I want to use one
variable in each roop. How can I do this? See below
for (i in 1:100){
f(vi)
}
Thanks
David
[[alternative HTML version deleted]]
arun
2013-Dec-14 21:22 UTC
[R] How to use variables whose names are with number at end in R loop
Hi,
If the variables described are the columns in a data.frame,
? set.seed(24)
?dat1 <- as.data.frame(matrix(sample(100,100*10,replace=TRUE),ncol=100))
?f1 <- function(x) mean(x,na.rm=TRUE)
?sapply(1:100,function(i) f1(dat1[,i]))
#or
?sapply(colnames(dat1),function(x) f1(dat1[,x]))
#IF these are standalone vectors
V1 <- dat1[,1]
?V2 <- dat1[,2]
sapply(1:2,function(i) f1(get(paste0("V",i))))
A.K.
On Saturday, December 14, 2013 4:07 PM, Marino David <davidmarino838 at
gmail.com> wrote:
Hi all:
Assume that I have variables, say v1, v2,...,v100 and I want to use one
variable in each roop. How can I do this? See below
for (i in 1:100){
f(vi)
}
Thanks
David
??? [[alternative HTML version deleted]]
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and provide commented, minimal, self-contained, reproducible code.
Hervé Pagès
2013-Dec-14 21:43 UTC
[R] How to use variables whose names are with number at end in R loop
Hi David, On 12/14/2013 01:06 PM, Marino David wrote:> Hi all: > > Assume that I have variables, say v1, v2,...,v100 and I want to use one > variable in each roop. How can I do this? See below > > for (i in 1:100){ > f(vi) > }for (i in 1:100){ f(get(paste0("v", i))) } Cheers, H.> > > Thanks > > David > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org 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. >-- Herv? Pag?s Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpages at fhcrc.org Phone: (206) 667-5791 Fax: (206) 667-1319