On Feb 11, 2011, at 7:09 PM, Dominick Samperi wrote:
Is there documentation on R limits?
That is, max matrix size, etc.?
Diagnostics when limits are exceeded are not always
meaningful. For example:
x <- rep(0,50000*50000)
Error in rep(0, 50000 * 50000) : invalid 'times' argument
In addition: Warning message:
In as.vector(data) : NAs introduced by coercion
> x <- rep(0,40000*50000)
> gc()
used (Mb) gc trigger (Mb) max used (Mb)
Ncells 4673306 249.6 6945861 371.0 5315868 283.9
Vcells 2165579376 16522.1 4374103452 33371.8 4165580443 31780.9
> object.size(x)
16000000040 bytes
So that is about 2/3 of my installed memory. This seems to be a
limitation due to the maximum positive integer being ~ 2*10^9
> 2*10^9 < 50000*50000
[1] TRUE
> 2*10^9 < 40000*50000
[1] FALSE
Here's another example:
library(orthopolynom)
hermite <- hermite.h.polynomials(1001)
hermite[[1001]] # should display 1000-th degree polynomial
Error in if (signs[1] == "- ") "-" else "" :
missing value where TRUE/FALSE needed
Sounds as though the maximum length of an element of type character
has been exceeded.
Thanks,
Dominick
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David Winsemius, MD
West Hartford, CT
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