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Matrix size issue #20

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seonghobae opened this issue Sep 10, 2020 · 1 comment

seonghobae commented Sep 10, 2020 •

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Hello,

I met a error message what about matrix size issue.

error: Mat::init(): requested size is too large; suggest to compile in C++11 mode and/or enable ARMA_64BIT_WORD

Anybody can check out this issue?
I saw https://stackoverflow.com/questions/40592054/large-matrices-in-rcpparmadillo-via-the-arma-64bit-word-define this article.

Best,
Seongho

Contributor

coatless commented Sep 11, 2020

@seonghobae thanks for raising the issue.

I'm hesitant to apply -DARMA_64BIT_WORD without a little context on the data it is being applied to:

What k value are you trying?
How big is the item matrix?

I say this because there isn't a lot of plumbing on R's side to easily hand the long long indices that accompany a matrix defined as such. c.f. http://lists.r-forge.r-project.org/pipermail/rcpp-devel/2014-December/008293.html

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