assign(paste("list_", i, "[[1]]", sep = ""), 5) creates a new variable with a
funny name.
You'd have to parse() and eval() to make that work, something like
eval(parse(text=paste("list_",i,"[[1]]<-",5, sep="")))
However,
-------
> fortunes::fortune("parse")
If the answer is parse() you should usually rethink the question.
-- Thomas Lumley
R-help (February 2005)
-------
It is much easier to handle this using a data structure containing a list of
lists:
l <- rep(list(list()), 10)
for ( i in 1:10 )
l[[i]][[1]] <- 5
> On 30 Apr 2017, at 17:17 , Jinsong Zhao <jsz...@yeah.net> wrote:
>
> Hi there,
>
> I have a problem with assign(). Here is the demo code:
>
> for (i in 1:10) {
> # create a list with variable name as list_1, list_2, ..., etc.
> assign(paste("list_", i, sep = ""), list())
> # I hope to assign 5 to list_?[[1]], but I don't know how to code it.
> # list_1[[1]] <- 5 # works, however
> assign(paste("list_", i, "[[1]]", sep = "", 5) # does not work
> }
>
> How to do? Is there any alternatives? Many thanks!
>
> Best,
> Jinsong
>
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--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd....@cbs.dk Priv: pda...@gmail.com
______________________________________________
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