You may want to try downloading the development version of R at http://cran.us.r-project.org/bin/windows/base/rdevel.html. This version deals with Windows' deficiencies in memory management a little better.

-roger

Yi-Xiong Sean Zhou wrote:

After memory.limit(1500), the error message still pop out:

Error: cannot allocate vector of size 11529 Kb

While


memory.size()

[1] 307446696


memory.limit()

[1] 1572864000


And the system is only using 723MB physical memory, while 2G is the total.

Does anyone have a clue of what is going on?


Yi-Xiong



-----Original Message-----
From: Uwe Ligges [mailto:[EMAIL PROTECTED] Sent: Saturday, April 03, 2004 12:40 PM
To: Yi-Xiong Sean Zhou
Cc: [EMAIL PROTECTED]
Subject: Re: [R] memory limit problem




Yi-Xiong Sean Zhou wrote:

Could anyone advise me how to allocate 1.5Gbyte memory for R on a Dell
laptop running XP professional with 2G memory?


See ?Memory or the the R for Windows FAQ, which tells you:

"2.7 There seems to be a limit on the memory it uses!

Indeed there is. It is set by the command-line flag --max-mem-size (see
How do I install R for Windows?) and defaults to the smaller of the
amount of physical
RAM in the machine and 1Gb. [...]"



I have tried

"C:\Program Files\R\rw1081\bin\Rgui.exe" --max-vsize=1400M

but I only get only 500MB for R actually.


I also tried memory.limit(2^30) in R and got error of:


Well, you don't want to allocate 2^30 *Mega*Bytes (see ?memory.limit),
do you?



Either use the command line flag --max-mem-size=1500M or within R: memory.limit(1500)



Error in memory.size(size) : cannot decrease memory limit


Since your limit was roughly 10^6-times off the right one, you got an
integer overflow internally, I think.

Uwe Ligges




Yi-Xiong

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