[R] how do I exort a list of numbers into csv file?

Joshua Wiley jwiley.psych at gmail.com
Mon Feb 6 03:42:02 CET 2012

Hi Michael,

Part of me imagines this is overkill, but this should be one option:

## your data
mylist <- list(1:3, 3:6)
## open a writeable connection to a file
con <- file("test.csv", "w")
## first collapse each element of the list to be a comma separated
string, then write each
## element of new character vector to con using writeLines
writeLines(sapply(mylist, paste, collapse = ", "), con = con)
## close the connection

see ?writeLines for details on different ways to indicate end of the line.

Hope this helps,


On Sun, Feb 5, 2012 at 6:01 PM, Michael <comtech.usa at gmail.com> wrote:
> Hi all,
> I have a list of vector of numbers - the reason I used list of vector was
> that I each list have different numbers of numbers which I don't know
> before run-time.
> mylist[[1]]  = c(1, 2, 3)
> mylist[[2]] = c (3, 4, 5, 6)
> ...
> ...
> etc.
> Could you please tell me if there is a way to dump all these at once into
> csv file such that each row correspond to a vector or a cell of the list as
> shown above?
> Thanks a lot!
>        [[alternative HTML version deleted]]
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Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, Statistical Consulting Group
University of California, Los Angeles

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