This comment won't help you much, but still... there are usually a lot
of ways you can do to implement a bootstrap, and a lot of the
approaches people use (especially if they are used to think in C-like
terms) are pretty slow. But it can be made quite fast. So: are you
sure you have optimized it? You could try profiling. Have you looked
at the boot library?
Kasper
On May 5, 2008, at 11:58 AM, Kyeongmi Cheon wrote:
Hello
I wrote a bootstrap program in C language that is called and run by R.
When I tried it, it is slow
and I'm trying to write and run the whole thing in C. But I cannot use
handy functions in R and
need to figure out how to write those functions by myself. Is there
any way that I can get the
actual codes that implement functions in R so that I can translate
them into other languages? For
example, after I generate bootstrap samples in C, I want to simplify
the new dataset just like I
did it in R using "aggregate(data$variable1,
list(data$variable2,data$variable3), length) or
aggregate(data$variable1, list(data$variable2,data$variable3), sum)
etc". How could I do that in C
and is there any way to find out how it is implemented in R? Thank
you.
Kyeongmi
Univ. Memphis
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