[BioC] steps to manually build AffyBatch object

[Weiwei Shi]

Dear Listers:

I read some post about the memory hungry during use of ReadAffy(). I
believe the error I met with was caused by that:
> Data <- ReadAffy()
Error: cannot allocate vector of size 704969 Kb
R(397,0xa000d000) malloc: *** vm_allocate(size=721891328) failed (error code=3)
R(397,0xa000d000) malloc: *** error: can't allocate region
R(397,0xa000d000) malloc: *** set a breakpoint in szone_error to debug
R(397,0xa000d000) malloc: *** vm_allocate(size=721891328) failed (error code=3)
R(397,0xa000d000) malloc: *** error: can't allocate region
R(397,0xa000d000) malloc: *** set a breakpoint in szone_error to debug
> sessionInfo()
R version 2.4.1 (2006-12-18)
i386-apple-darwin8.8.1

locale:
en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

other attached packages:
    affy   affyio  Biobase
"1.12.2"  "1.2.0" "1.12.2"


My chip sets contains 178 U133A chips and I use 15 out of them for a
test to create an AffyBatch object and it ends with the size as below:
         Class    KB
Data AffyBatch 55457

So, I assume I could go around to manually create AffyBatch object by
"combining" ~12 folds of such sub-objects. But I don't know how. Can
anyone provide some details about it?

Thanks,

-- 
Weiwei Shi, Ph.D
Research Scientist
GeneGO, Inc.

"Did you always know?"
"No, I did not. But I believed..."
---Matrix III