I sent this to Bioconductor, but I think it is more of an R listserv
question, because of memory allocation trouble


I am having trouble getting the function heatmap() to work on the following
gene expression

> dim(SAMPLES_log)
[1] 12626    20


           sample1 sample2...................sample20
gen1
gen2
gen3
....
gen12626



I have converted SAMPLES_log to a numeric matrix using:

as.matrix(SAMPLES_log)

when I use the following command:

heatmap(SAMPLES_log)

Error: cannot allocate vector of size 622668 Kb
In addition: Warning messages:
1: Reached total allocation of 1022Mb: see help(memory.size)
2: Reached total allocation of 1022Mb: see help(memory.size)



Is there some library in BioConductor that will allow me to output a
heatmap. I want to compare the expression of the first 10 samples with the
last 10 samples.

I have tried running that command in a Linux environment, also with no
success

thank you,

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