
Ublas : 
From: Michael Stevens (mail_at_[hidden])
Date: 20051106 13:46:15
On Thursday, 3. November 2005 16:31, Angus Leeming wrote:
> It appears that mapped_matrix has no non_zeros() member function, yet
> the constructors of other matrix types (say, compressed_matrix) have
> a field for this information.
The 'nnz' and function replaces 'non_zeros'.
> What is the recommended way, therefore to create a compressed_matrix
> from a mapped_matrix?
I would simply use the general expression constructor with an non_zeros
parameter.
compressed_matrix c (m, m.nnz() );
The efficiency will non be as great as a specialised constructor but should be
OK.
Michael
 ___________________________________ Michael Stevens Systems Engineering 34128 Kassel, Germany Phone/Fax: +49 561 5218038 Navigation Systems, Estimation and Bayesian Filtering http://bayesclasses.sf.net ___________________________________