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.

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

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Hi David,

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
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