On Jul 20, 2011, at 5:04 PM, Vickie S wrote:
Hi friends,
I have got a list where each element might have variable number of
members.
$`4213`
[1] "214077_x_at"
$`164832`
[1] "225996_at" "235977_at"
$`339010`
[1] NA
$`23410`
[1] "221562_s_at" "221913_at" "49327_at"
$`285386`
[1] "229764_at"
$`2099`
[1] "205225_at" "211233_x_at" "211234_x_at" "211235_s_at"
[5] "211627_x_at" "215551_at" "215552_s_at" "217163_at"
[9] "217190_x_at"
If you had posted the output from dput(head(this_list)) it would have
made testing easier. Observe:
> dput(this_list)
structure(list(`4213` = "214077_x_at", `164832` = c("225996_at",
"235977_at"), `339010` = NA, `23410` = c("221562_s_at", "221913_at",
"49327_at"), `285386` = "229764_at"), .Names = c("4213", "164832",
"339010", "23410", "285386"))
So now all one need to do is stick a "<-" in between the name and the
structure expression and one has a "reproducible example".
(testing on these first four entries)
> matrix( c( rep(names(this_list), sapply(this_list, length)) ,
+ unlist(this_list)
+ ) , ncol=2)
[,1] [,2]
[1,] "4213" "214077_x_at"
[2,] "164832" "225996_at"
[3,] "164832" "235977_at"
[4,] "339010" NA
[5,] "23410" "221562_s_at"
[6,] "23410" "221913_at"
[7,] "23410" "49327_at"
[8,] "285386" "229764_at"
I want to integrate this list in a matrix format like this :
4213 "214077_x_at"
164832 "225996_at"
164832 "235977_at"
339010 NA
23410 "221562_s_at"
23410 "221913_at"
23410 "49327_at"
You cannot mix modes in matrices. They all need to be "character".
....
Any idea how can I make such type of matrix ?
Thanks,
Vickie
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David Winsemius, MD
West Hartford, CT
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
