[R] maximum elements in an ff object?

[Benilton Carvalho]

Hi Matt,

you're correct: length(ffObject) must be smaller than 2^31-1... at
least until R has a 64bit integer type, it seems...

in the meantime, use the bigmemory package. ;-)

b

On Fri, Feb 5, 2010 at 4:18 PM, Matthew Keller <mckellercran at gmail.com> wrote:
> Hello all,
>
> I hate to add to the daily queries regarding R's handling of large
> datsets ;), but...
>
> I read in an online powerpoint about the ff package something about
> the "length of an ff object" needing to be smaller than
> .Machine$integer.max. Does anyone know if this means that the # of
> elements in an ff object must be < .Machine$integer.max [i.e., that ff
> provides no help with respect to the number of elements in a given
> object]? I've got a matrix that has 19e9 elements and - even though I
> can fit it into my ram (using "raw" storage.mode) - R won't let me
> store it because 19e9 is >> .Machine$integer.max = 2^31.
>
> Anyone else have suggestions on how to deal with such massive datasets
> like the ones I'm using? I'm exploring ncdf as we speak. Best,
>
> Matt
>
>
>
> --
> Matthew C Keller
> Asst. Professor of Psychology
> University of Colorado at Boulder
> www.matthewckeller.com
>
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