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Re: [Help-gsl] Vector and matrix views
From: |
Brian Gough |
Subject: |
Re: [Help-gsl] Vector and matrix views |
Date: |
Thu, 8 Dec 2005 18:29:47 +0000 |
James Bergstra writes:
> The same trick works for matrix types. Matrices have two sizes instead of
> one,
> and the 'stride' between columns on the same row is always assumed to be 1,
> but
> other than that, the things are analogous. For some reason, a matrix stride
> (from row to row) is in a field called 'tda'.
In fortran it is LDA (standing for "leading dimension of A" ) with
column-major matrices.
In C the matrices are row-major so everything is reversed, hence it
was named "trailing dimension of A" = tda.
--
Brian Gough
Network Theory Ltd,
Publishing Free Software Manuals --- http://www.network-theory.co.uk/