From: Rhys Ulerich <rhys.ulerich@gmail.com>
To: Patrick Alken <patrick.alken@colorado.edu>
Cc: "gsl-discuss@sourceware.org" <gsl-discuss@sourceware.org>
Subject: Re: increment a single element of matrix/vector
Date: Tue, 28 Jan 2014 02:08:00 -0000 [thread overview]
Message-ID: <CAKDqugSbjFausECoC3Bm_JdYtOK9VwuG_nkOKtqk4A_e+Cb0Bw@mail.gmail.com> (raw)
In-Reply-To: <52E6EFF3.1000808@colorado.edu>
> I was thinking of adding two routines to GSL, to increment a single element
> of a matrix or vector by some amount, since I'm always doing things like:
>
> gsl_vector_set(v, i, gsl_vector_get(v, i) + x);
>
> which I think is ugly and annoying....
Agreed. This has often bugged me.
> Or also is there another solution to this problem that I don't know about?
How about using
INLINE_DECL double * gsl_vector_ptr (gsl_vector * v, const size_t i);
to say *gsl_vector_ptr(v, i) += x ? Never knew about this until I
just went fishing for it.
- Rhys
next prev parent reply other threads:[~2014-01-28 2:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 23:47 Patrick Alken
2014-01-28 2:08 ` Rhys Ulerich [this message]
2014-01-28 2:15 ` Rhys Ulerich
2014-01-28 3:06 ` Patrick Alken
2014-01-28 20:45 ` Patrick Alken
2014-01-28 21:16 ` Rhys Ulerich
2014-01-28 21:26 ` Patrick Alken
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