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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?

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.


Brian Gough

Network Theory Ltd,
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