[R] replace a for loop
Ivan Calandra
ivan.calandra at uni-hamburg.de
Wed Feb 10 10:50:49 CET 2010
Hi everybody!
I'm still quite new in R and I don't really understand this whole
"vectorization" thing.
For now, I use a for loop (and it works fine), but I think it would be
useful to replace it.
I want to export the result of a test statistic, which is stored as a
list, into a csv file. I therefore have to export each element of the
list separately.
Here is the code:
----
str(test)
List of 3
$ output : num [1:15, 1:6] 1 2 3 4 5 6 7 8 9 10 ...
..- attr(*, "dimnames")=List of 2
.. ..$ : NULL
.. ..$ : chr [1:6] "con.num" "psihat" "p.value" "p.crit" ...
$ con : num [1:6, 1:15] 1 -1 0 0 0 0 1 0 -1 0 ...
$ num.sig: int 0
for (i in 1:3){
write.csv(test[[i]], file="filename.csv", append=T, quote=F, row.names=T)
}
----
As I said, I don't completely understand, but I think one of these
"apply" function might do what I need.
Thanks in advance
Ivan
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