[bug-gsl] Re: gsl_blas_dgemv return a 0 vector when using a vector twice (2008-08-30)
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From: |
Brian Gough <bjg@gnu.org> |
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Subject: |
Re: gsl_blas_dgemv return a 0 vector when using a vector twice |
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Date: |
Sat, 30 Aug 2008 11:25:19 +0100 |
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To: |
Alejandro Cruz-Marcelo <ac6@........> |
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Cc: |
bug-gsl@gnu.org |
At Fri, 29 Aug 2008 09:44:30 -0500,
Alejandro Cruz-Marcelo wrote:
> gsl_blas_dgemv(CblasNoTrans,
> 1.0, A, y,
> 1.0, y)
> then y becomes a vector of 0's and no error is produced, even though the
> operation A*y + y makes perfect sense. I believe that in the
> documentation there is no warning about using the same vector twice in
> the function.
Please can you send an example program that demonstrates the problem,
thanks.
--
Brian Gough
