But:
> 2^31-1 # is more than the specified problem length
[1] 2147483647
> 2130706560
You may be dealing with a system that is not facile at memory
allocation. Windows?
On Jul 22, 2009, at 9:16 AM, Allan Engelhardt wrote:
It is a little stupid, but the length of a vector is limited to
2^31-1 entries on any platform. A matrix is stored as a vector, so
the product of all dimensions is also limited to 2^31-1.
Allan.
Matthew Gwynne wrote:
Hi,
I have been using the QCA package, in particular the "eqmcc" function
and I am having some issues when trying to use this to minimise a
particular boolean function.
The boolean function in question has 16 variables, and I am
providing
the full truth table for the function (65536 with 256 true entries),
in the following way :
library(QCA)
func_tt = read.table("func.tt",header=TRUE)
eqmcc(func_tt, outcome="O", expl.0=TRUE)
However, after calculating for a little while, the system throws up a
memory error :
Error in vector("double", length) :
cannot allocate vector of length 2130706560
However, looking at the memory usage, I seem to have far more than
2GB free.
Is there some kind of built-in limit on the size of the heap in R? If
so, is there some way I can extend this?
Does anyone have any insight into this? Perhaps I am doing
something stupid?
Thanks
Matthew
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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