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Subject: Re: [R] Matrix Multiplication using R.
Dear Doran, Bert and Roger,
Thank you for attending my query and for your valuable responses.
The task is slightly more complex. Here's the real case... I have genetic
variation data (40,000 single nucleotide polymorphisms) from 9
ly appreciated.
>
> Regards,
>
> Praveen.
>
> -Original Message-
> From: Roger Koenker [mailto:rkoen...@illinois.edu]
> Sent: 14 August 2013 23:06
> To: Praveen Surendran
> Cc: r-help@r-project.org
> Subject: Re: [R] Matrix Multiplication using R.
>
> I
rkoen...@illinois.edu]
Sent: 14 August 2013 23:06
To: Praveen Surendran
Cc: r-help@r-project.org
Subject: Re: [R] Matrix Multiplication using R.
In the event that these are moderately sparse matrices, you could try Matrix or
SparseM.
Roger Koenker
rkoen...@illinois.edu
On Aug 14, 2013, at 10:
In the event that these are moderately sparse matrices, you could try Matrix or
SparseM.
Roger Koenker
rkoen...@illinois.edu
On Aug 14, 2013, at 10:40 AM, Praveen Surendran wrote:
> Dear all,
>
> I am exploring ways to perform multiplication of a 9 x 4 matrix with
> it's transpose
Well, one might start by noting that it's usually unnecessary and
unwise to multiply a matrix by its transpose.
Matrix decompositions, algebraic identities, and/or iterative
procedures usually do calculations involving t(x)%*%x in better ways.
'Course without knowledge of your problem, maybe I'm
To: r-help@r-project.org
Subject: [R] Matrix Multiplication using R.
Dear all,
I am exploring ways to perform multiplication of a 9 x 4 matrix with
it's transpose.
As expected even a 4 x 100 %*% 100x4 didn't work on my desktop...
giving the error "Error: cannot
Dear all,
I am exploring ways to perform multiplication of a 9 x 4 matrix with
it's transpose.
As expected even a 4 x 100 %*% 100x4 didn't work on my desktop...
giving the error "Error: cannot allocate vector of length 16"
However I am trying to run this on one node (64G
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