[R] how to simply the procedure of creating a group of data.frame?

[Dimitris Rizopoulos]

one way is the following:

for (i in 1:50) {
     dd <- data.frame(x = gl(2, 1), y = rnorm(2))
     assign(paste("d", i, sep = ""), dd)
}

However, I would suggest to put all these data.frames in list, e.g.,

df.list <- lapply(1:50, function (i) data.frame(x = gl(2, 1), y = rnorm(2)))
names(df.list) <- paste("d", seq_along(df.list), sep = "")


I hope it helps.

Best,
Dimitris

tedzzx wrote:
> Dear R users,
> 
> I want to creat a group of data frames, such as:
> d1<-data.frame(x=factor(),y=numeric(),...)
> d2<-data.frame(x=factor(),y=numeric(),...)
> d3<-data.frame(x=factor(),y=numeric(),...)
> :
> :
> d50<-data.frame(x=factor(),y=numeric())
> 
> How can I use the loop to simply my procedure?
> Thanks advance
> 
> Ted

-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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