[R] memory issues

From: Dave Depew <ddepew_at_sciborg.uwaterloo.ca>
Date: Wed, 16 Apr 2008 10:59:44 -0400

Hi all,
I've read the R for windows FAQ and am a little confused re: memory.limit and memory.size

to start using R 2.6.2 on WinXP, 2GB RAM, I have the command line "sdi --max-mem-size=2047M"
Once the Rgui is open, memory.limit() returns 2047, memory.size() returns 11.315, and memory.size(max=T) returns 19.615

Shouldn't memory.size(max=T) return 2047?

Upon running several operations involving kriging (gstat package, original data file 3 variables, 12000 observations)  the program runs out of memory

"memory.c", line 57: can't allocate memory in function m_get() Error in predict.gstat(fit.uk, newdata = EcoSAV.grid.clip.spxdf, debug.level = -2, :

Immediately following this,

memory.limit() returns [1] -Inf

                        Warning message:
                            In memory.limit() : no non-missing arguments 
to max; returning -Inf

memory.size() returns 24.573.

memory.size(max=T) returns 46.75

To my untrained eye, it appears that R is not being allowed access to the full memory limit specified in the cmd line....if this is the case, how does one ensure that R is getting access to the full allotment of RAM? Any insight is appreciated...

> sessionInfo()

R version 2.6.2 (2008-02-08)

LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252

attached base packages:
[1] stats graphics grDevices datasets tcltk utils methods base

other attached packages:
 [1] maptools_0.7-7 foreign_0.8-23 gstat_0.9-43 rgdal_0.5-24 lattice_0.17-4 sp_0.9-23 svSocket_0.9-5 svIO_0.9-5 R2HTML_1.58 svMisc_0.9-5 svIDE_0.9-5

loaded via a namespace (and not attached): [1] grid_2.6.2 tools_2.6.2

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