Hi:

2^40
[1] 1.099512e+12

Do you have enough memory for almost 1.1 trillion rows and 40 columns?
This is a good example of the 'power law' that Stephen Strogatz discussed in
his New York Times article today:
http://opinionator.blogs.nytimes.com/2010/03/28/power-tools/?hp

HTH,
Dennis

On Mon, Mar 29, 2010 at 8:27 PM, Bogaso <bogaso.christofer@gmail.com> wrote:

>
> Hi, good morning,
>
> I got following error which looks strange to me while executing this code :
>
> > temp <- expand.grid(rep(list(c(1,0)),40))
> Error in rep.int(rep.int(seq_len(nx), rep.int(rep.fac, nx)), orep) :
>  invalid 'times' value
> In addition: Warning message:
> In rep.int(rep.int(seq_len(nx), rep.int(rep.fac, nx)), orep) :
>  NAs introduced by coercion
>
>
> However if I put a small number like 12 in place of 40, it is working fine.
> A moderately bigger number than 10 like 30 give a memory related error :
>
> > temp <- expand.grid(rep(list(c(1,0)),20))
> Warning messages:
> 1: Reached total allocation of 1535Mb: see help(memory.size)
> 2: Reached total allocation of 1535Mb: see help(memory.size)
> 3: In attributes(.Data) <- c(attributes(.Data), attrib) :
>  Reached total allocation of 1535Mb: see help(memory.size)
> 4: In attributes(.Data) <- c(attributes(.Data), attrib) :
>  Reached total allocation of 1535Mb: see help(memory.size)
>
> But I badly need to execute this code for a large number like 150 (which I
> dont think a big number at all). Is there any other way to do the same
> task?
> Your help will be highly appreciated.
>
> I am working with R-2.10.1 within Vista with a 3gb RAM.
>
> Thanks
>
> --
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>
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