[R] memory limit problem

[oleg portnoy]

Hi,
I have Win XP 32, 4 gig DDR2 and R 2.9.2.
I have memory limit problems.
> memory.limit(4090)
[1] 4090

> memory.limit()
[1] 4090
> a<-trans.matrix.f(7)  # made big matrix of integer 16384*16384
Error: cannot allocate vector of size 512.0 Mb
I not have other objects in R memory.
what I do?
trans.matrix.f <- function(x){
 tr.mat <- matrix(c(0,1,1,0),2)
 for(i in 2:(2*x))
  tr.mat <- rbind(cbind(tr.mat ,tr.mat+1),
  cbind(tr.mat+1,tr.mat ))
 return(tr.mat)
}

Thanks!
Oleg.

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[R] R programming question

[Oleg Portnoy]

I have two vectors of probability distribution of the same length n for
random variable X and Y. I want to built matrix of two-dimension
distribution for X and Y with assumption of independence.
P(X=i,Y=j)=P(X=i)*P(Y=j)
I want to do this very fast for n=120 and big amount of different
distribution of X and Y.
Thanks.

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