Re: [ublas] efficient way to convert a matrix to col major order

Subject: Re: [ublas] efficient way to convert a matrix to col major order
From: Umut Tabak (u.tabak_at_[hidden])
Date: 2011-08-08 11:57:03

> I do this:
>
> ublas::matrix<T, ublas::column_major> l_matrix(p_matrix);
>
> with p_matrix is ublas::row_major and working with the l_matrix 
> object. In my code I need most times the ublas::row_major structure 
> but some calls must be a ublas::column_major
>
> Phil
>    
Hi Phil,

Ok. I tried the same with sparse matrices which take incredibly too much 
time which is not feasible. Now I tried to assign values to a 
column_major compressed_matrix, this performance seems better but still 
row_major assignments go much much much faster. I should look into this 
problem, now, we were doing different things.

Umut