R help - May 2008 - Limitation to R Question

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.

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.

Thank you so much,
Qin J. Gao

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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,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595