Re: [Boost-users] uBLAS sparse_matrix "default" value

From: Thomas Lemaire (thomas.lemaire_at_[hidden])
Date: 2005-02-02 02:19:29

the new ublas mailing list is:

ublas_at_[hidden]

you should post there, you will have better chance to be answered...

Austin Bingham wrote:
> Apparently the wheels of the ublas mailing list move slowly, so I'm
> asking this question here.
> 
> Is there any way to set the "default" value of a sparse_matrix?
> sparse_matrix seems to guarantee that you always get a value when you
> access an index, even if that index hasn't been explicitly set. For
> sparse_matrix<float>, for instance, you get 0. Is there any way to
> specify this value? That is, if I wanted to get back, say, -1 for
> unset entries, is there a way to do this? There's no direct mention of
> this that I can find, although there were some discussions of
> zero-constructors or somesuch that may have been dealing with this
> question. Thanks.
> 
> Austin Bingham
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-- 
thomas