>>>>> "am" == alessia matano <alexis....@gmail.com>
>>>>> on Mon, 11 Jan 2010 15:38:39 +0100 writes:
am> Many thanks for your suggestions,
am> fortunately when I closed R and opeedn it again, it did not give again
am> that error. However, now there is something more strange happening,
am> related again to sparse matrix, and I am afraid it could concern
am> memory problems (I put 4000 of memory limit).
am> I am defining a matrix where I have nrow=113289, ncol=36698 such as:
am> D<- as.matrix.csr(0, nrow, ncol)
am> Error in if (length(x) == nrow * ncol) x <- matrix(x, nrow, ncol) else
{ :
am> missing value where TRUE/FALSE needed
am> In addition: Warning message:
am> In nrow * ncol : NAs produced by integer overflow
am> With reduced number of rows and columns it worked, so I am wondering
am> wether it is a problem of memory.
It's not; rather a "trap" that the programmers of SparseM fell
into (I did too, in the past): Your nrow and ncol are so
large that nrow * ncol is larger than R's maximal integer,
( == .Machine$integer.max which is 2^31 - 1 on all current versions of R)
and so overflows to NA and such leads to the
"missing value" warning you see.
am> My pc has 6gb of nmemory, and it is
am> 64-bit windows system, but R reads only 4 has capacity.
am> Thanks for your help
am> alessia
As a side note:
As co-author of R package 'Matrix' in to which we have put a
large amount of work and which is nowadays a recommended package
(i.e., also part of every R distribution),
I do wonder why you don't use 'Matrix' for sparse matrix
computing in R.
Best regards,
Martin Maechler, ETH Zurich
am> 2010/1/11 David Winsemius <dwinsem...@comcast.net>:
>>
>> On Jan 11, 2010, at 7:55 AM, Peter Ehlers wrote:
>>
>>> Do you have the same problem with the example
>>> on the help page?
>>>
>>> ?'%x%-methods'
>>>
>>> Works for me on Windows Vista (32-bit OS) and
>>> R version 2.10.1 Patched (2010-01-05 r50896).
>>>
>>> -Peter Ehlers
>>>
>>> alessia matano wrote:
>>>>
>>>> Dear all,
>>>> I just installed the new version of R, 2.10.1, and I am currently
>>>> using the package sparseM. (I also use a 64 bit windows version)
>>
>> SparseM
>>
>>>> I got a problem that I never had: when I try to multiply with a
>>>> kronecker product (%x%) two sparse matrixes I get the following
>>>> message:
>>>> Error in dim(x) <- length(x) : invalid first argument
>>>> I never had this problem with previous versions of R.
>>
>> I get the same error as you do when trying the example on the cited help
>> page using SparseM 0.83 in a 64 bit Mac version of 2.10.1
>>
>>> A.csr %x% matrix(1:4,2,2)
>> Error in dim(x) <- length(x) : invalid first argument
>>
>>> sessionInfo()
>> R version 2.10.1 RC (2009-12-09 r50695)
>> x86_64-apple-darwin9.8.0
>>
>> locale:
>> [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
>>
>> attached base packages:
>> [1] grid splines stats graphics grDevices utils datasets
>> methods base
>>
>> other attached packages:
>> [1] SparseM_0.83 Matrix_0.999375-32 Epi_1.1.10
plotrix_2.7-2
>> ROCR_1.0-4
>> [6] gplots_2.7.4 caTools_1.10 bitops_1.0-4.1 gdata_2.6.1
>> gtools_2.6.1
>> [11] lattice_0.17-26 Design_2.3-0 Hmisc_3.7-0
>> survival_2.35-7
>>
>> loaded via a namespace (and not attached):
>> [1] cluster_1.12.1 tools_2.10.1
>>
>>
>>
>>>> May you help me?
>>>> thanks
>>>> alessia
>>>> ______________________________________________
>>>
>>> --
>>> Peter Ehlers
>>> University of Calgary
>>> 403.202.3921
>>>
>>> ______________________________________________
>>
>> David Winsemius, MD
>> Heritage Laboratories
>> West Hartford, CT
>>
>>
am> ______________________________________________
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am> and provide commented, minimal, self-contained, reproducible code.
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