[R] Help on making code faster-would C help ?

From: Benn Fine <bennfine_at_yahoo.com>
Date: Fri 21 Jul 2006 - 00:47:40 EST

Using R on windows....

I have the following code

for(i in 1:10000) {

draw some random weights

perfom a weighted least squares regression

some simple addition and multiplication

The code works fine but is slow.

I have mingw installed and can dyn.load, although I am more used to doing this on Unix than Windows.

Would it make sense to re-write the whole thing in C ? I am vectorizing the random draws-the speed culprit is looping and the matrix manipulations.

My guess is to use the matrix routines from gls-does this sound feasible ?


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