On 26/08/2009 3:20 PM, Noah Silverman wrote:
Hi,
Is there a way to build up a vector, item by item. In perl, we can
"push" an item onto an array. How can we can do this in R?
I have a loop that generates values as it goes. I want to end up with a
vector of all the loop results.
In perl it woud be:
for(item in list){
result <- 2*item^2 (Or whatever formula, this is just a pseudo example)
Push(@result_list, result) (This is the step I can't do in R)
}
Thanks!
Use the c() function, e.g.
result <- numeric(0)
for (item in list) {
result <- 2*item^2
result_list <- c(result_list, result)
}
If the list is long, this is an extremely inefficient style of R
programming, but for a short list it should be fine.
Duncan Murdoch
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