On 07/19/2012 06:11 PM, Bert Gunter wrote:
Hadley et. al:
Indeed. And using a loop is a poor way to do it anyway.
v <- as.list(rep(FALSE,dotot))
is way faster.
-- Bert
I agree that not using a loop is much faster, but I assume that the
original question is about the situation where the size of the end
result is not known. The values FALSE in the vector/list are just
examples of results from a more complex computation. But indeed avoid
loops where possible (and often this is possible).
Jan
On Thu, Jul 19, 2012 at 8:50 AM, Hadley Wickham <had...@rice.edu> wrote:
On Thu, Jul 19, 2012 at 8:02 AM, Jan van der Laan <rh...@eoos.dds.nl> wrote:
Johan,
Your 'list' and 'array doubling' code can be written much more efficient.
The following function is faster than your g and easier to read:
g2 <- function(dotot) {
v <- list()
for (i in seq_len(dotot)) {
v[[i]] <- FALSE
}
}
Except that you don't need to pre-allocate lists...
Hadley
--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/
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