Re: [R] Limitation to R Question

From: Prof Brian Ripley <>
Date: Tue, 06 May 2008 05:45:52 +0100 (BST)

On Mon, 5 May 2008, qin gao wrote:

> Dear Helpers of R,
> I was wondering if you can help me with a few question about the program. I
> was trying create an expression file from my CEL files and I came upon an
> error stating that I had not enough memory and to see help(memory.size).
>> From reading the help txt it seems that my max memory allocation has been
> reached. I am thinking, this is also why my computer freezes sometimes when
> I am running a data set that contains over 75 CEL files. Is there a way to
> solve this issue?
> Furthermore, my lab is thinking of purchasing new computers because our PC
> are kind of old and we were thinking of upgrading to macs. However, before
> we do this, I wanted to know what are the limitation to R (ie. is it just
> memory or are there other issues) and even if we purchase macs with 4GB of
> memory would this solve our memory problem and be able to handle large
> amount of data sets.

Larger at least -- 'large' is relative, and you have't told us the current size of your PC(s). See ?"Memory-limits". Currently there is no 64-bit version of R available for Windows, but there is for Mac OS -- however the latter is new (for R 2.7.0) and hence only beginning to be field-tested (and we do know of a couple of problems with the 64-bit compiler used).

> I would really appreciate it if someone can please help me out. I don't know
> many people that uses R at UCSD so it would help to talk to someone who
> knows the program.

>From your description, you would do better to ask on the Bioconductor list
-- there is a lot of software for gene expression (I guess that is what you meant) in Bioconductor.

> Thank you so much,
> Qin J. Gao
> [[alternative HTML version deleted]]
> ______________________________________________
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Brian D. Ripley,        
Professor of Applied Statistics,
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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