Re: Using DTRTRS (solve triangular system) from Octave

[c.]

On 28 Nov 2013, at 15:43, José Luis García Pallero <address@hidden> wrote:

> Hello:
> 
> I need to solve a triangular system in Octave. Exists a way in Octave
> to use the DTRTRS Lapack routine, which is the one to solve a
> triangular system?
> 
> Cheers

IIRC, Yes. 

If you use mldivide to solve a triangular system Octave should automatically
choose DTRTRS to solve it, i.e.:

A = tril (randn (10, 10));
b = ones (10, 1);

x = A\b;

Should solve the system using DTRTRS.

If you want to check more precisely what is actually done, you can have a look 
at the source code of the file dMatrix.cc.

HTH,
c.