R help - Aug 2010 - cannot allocate vector of size 381.5 Mb

Hi,
  I read some posts from the mailing list on the same problem, but it seems
that i still cannot solve this problem.
I only want to generate some simulated data.
#Generate 2500 observations-it works without errors
> coords<-as.matrix(expand.grid(seq(0,100,length.out=50),
seq(0,100,length.out=50)))
#SimData is a user-written function
> SimBinData<-SimData(n=2500,coords=coords,
x.mu=c(0,1),covar.cor=matrix(c(1,0.25,0.25,1),
2, 2),beta=c(1,0.5,5))
#Generate 10000 observations-errors appeared
#Following some posts, i set the memory to the maximum value. But i still
got errors.
> memory.limit(size = 4095)
[1] 4095
> coords<-as.matrix(expand.grid(seq(0,100,length.out=100),
seq(0,100,length.out=100)))
> SimBinData<-SimData(n=10000,coords=coords,
x.mu=c(0,1),covar.cor=matrix(c(1,0.25,0.25,1),
2, 2),beta=c(1,0.5,5))
Error: cannot allocate vector of size 381.5 Mb
> memory.size(TRUE)
[1] 1276.31
> memory.limit()
[1] 4095
> object.size(SimBinData)
170568 bytes
  Any suggestions?
  Thanks very much.

-- 
-----------------
Jane Chang
Queen's

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I would suggest two things here:

check on the size of other object you may have stored in memory, and get rid
of what you don't need.

? ls
? rm

also, consider running garbage collection to help free up memory in R

gc()

I hope this helps!
A

On Tue, Aug 31, 2010 at 1:56 AM, rusers.sh <rusers.sh@gmail.com> wrote:
> Hi,
>  I read some posts from the mailing list on the same problem, but it seems
> that i still cannot solve this problem.
> I only want to generate some simulated data.
> #Generate 2500 observations-it works without errors
> > coords<-as.matrix(expand.grid(seq(0,100,length.out=50),
> seq(0,100,length.out=50)))
> #SimData is a user-written function
> > SimBinData<-SimData(n=2500,coords=coords, x.mu
> =c(0,1),covar.cor=matrix(c(1,0.25,0.25,1),
> 2, 2),beta=c(1,0.5,5))
> #Generate 10000 observations-errors appeared
> #Following some posts, i set the memory to the maximum value. But i still
> got errors.
> > memory.limit(size = 4095)
> [1] 4095
> > coords<-as.matrix(expand.grid(seq(0,100,length.out=100),
> seq(0,100,length.out=100)))
> > SimBinData<-SimData(n=10000,coords=coords, x.mu
> =c(0,1),covar.cor=matrix(c(1,0.25,0.25,1),
> 2, 2),beta=c(1,0.5,5))
> Error: cannot allocate vector of size 381.5 Mb
> > memory.size(TRUE)
> [1] 1276.31
> > memory.limit()
> [1] 4095
> > object.size(SimBinData)
> 170568 bytes
>  Any suggestions?
>  Thanks very much.
>
> --
> -----------------
> Jane Chang
> Queen's
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
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> http://www.R-project.org/posting-guide.html
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>
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