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Re: [Help-gsl] gsl_vector stride
From: |
Brian Gough |
Subject: |
Re: [Help-gsl] gsl_vector stride |
Date: |
Mon, 7 Feb 2005 18:56:58 +0000 |
Henry Braun writes:
> Is there any reason why the stride parameter in gsl_vector is
> implemented as an (unsigned) size_t rather than as a signed
> integer?
Hello,
It is to reduce implementation complexity.
>
> I have some convolutions $C_j = \sum_{i = 0}^n x_i y_{j-i}$
> to evaluate and the obviously slick technique would be to create
> views of the $y$ vector with negative stride to pass to gsl_blas_ddot.
Just use cblas_ddot with -(y->stride) instead.
--
regards
Brian Gough
Network Theory Ltd,
Commercial support for GSL --- http://www.network-theory.co.uk/gsl/