Re: [R] Dataset size in R

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Thu 01 Sep 2005 - 22:26:59 EST

Peter.Watkins@foodscience.afisc.csiro.au wrote:

> Dear listers,
>
>
>
> I would like to know whether a maximum size is set for data sets in R.

Well, in theory, there are some limits re. size of some integers, but you are far away, as far as I understand.

In practice, you will somewhere hit the limit of available memory in your machine.

> I'm planning on analysing data sets which have 330000 points for a
> sample. The response is from GCxGC output.

I don't understand this point:
How many observations and how many variables?

> Also, with data analysis, is there a time-cost saving by performing the
> analysis in Linux as against doing it in Windows XP?

Depends on the problem. For really huge data, you might want to use a "64bit machine", 64bit adressing for a single R process is (yet) only supported on Linux. If memory does not matter, Linux is sometimes a bit faster, but it depends also on other facts like using CPU optimized linear algebra systems such as ATLAS or Goto's BLAS.

Uwe Ligges

>
>
> Many thanks, Peter
>
>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Sep 01 22:35:14 2005

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