[R] (subscript) logical subscript too long

[Maram SAlem]

Thanks a lot Giorgio, I used

memory.limit(size=4096)

but got

 don't be silly!: your machine has a 4Gb address limit

I'm working on my Ph.D. thesis and I have a huge code of which this is just
a very small part, so does this error mean that I need a new computer with
extended capabilites to be able to execute my code?? I'm currently using
intel core i3, windows 7

Thanks for helping.

Maram


On 1 October 2015 at 13:37, Giorgio Garziano <giorgio.garziano at ericsson.com>
wrote:

> Check your memory size by:
>
>
>
> memory.limit()
>
>
>
> try to increase it by:
>
>
>
> memory.limit(size=4096)
>
>
>
>
>
>
>
> *From:* Maram SAlem [mailto:marammagdysalem at gmail.com]
> *Sent:* giovedì 1 ottobre 2015 13:22
> *To:* Giorgio Garziano
> *Cc:* r-help at r-project.org
> *Subject:* Re: [R] (subscript) logical subscript too long
>
>
>
> Thanks Giorgio, I got it.
>
>
>
>  I managed to reach the matrix s whose rows represent  all the possible
> combinations. Here is the code:
>
>
>
> > n=12
>
> > m=7
>
> > D<-matrix(0,nrow=n-m+1,ncol=m-1)
>
> > for (i in 1:m-1)
>
> +  {
>
> + D[,i]<-seq(0,n-m,1)
>
> +  }
>
> > ED <- do.call(`expand.grid`,as.data.frame(D))
>
> > ED<-as.matrix(ED)
>
> > lk<-which(rowSums(ED)<=(n-m))
>
> > s<-ED[lk,]
>
>
>
> The problem now is that the code works only for relatively small values of
> n and m, but when I use, for ex., n=20 and m=9, I got this error
>
>
>
> > n=20
>
> > m=9
>
> > D<-matrix(0,nrow=n-m+1,ncol=m-1)
>
> > for (i in 1:m-1)
>
> +  {
>
> + D[,i]<-seq(0,n-m,1)
>
> +  }
>
> > ED <- do.call(`expand.grid`,as.data.frame(D))
>
>
>
> *Error: cannot allocate vector of size 1.6 Gb*
>
>
>
> *Any Suggestions please?*
>
>
>
> *Thanks Again.*
>
> *Maram*
>
>
>
> On 30 September 2015 at 17:41, Giorgio Garziano <
> giorgio.garziano at ericsson.com> wrote:
>
> Be:
>
> log <- (rowSums(ED) <= (n - m))
>
>
> Compare the following two values:
>
>
>
>
>
> length(log)
>
>
>
>
>
> nrow(w)
>
>
>
>
>
> --
>
> GG
>
>
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>
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