[Scilab-users] Scilab6 - ATOMS linalg_dgesv

[Samuel Gougeon]

Hello Claus,

The description header of this toolbox says:

/"These algorithms are most of the time already provided by Scilab, but 
are available here for comparison purpose."/

Indeed, in Scilab
A*X = B
is solved with*X = A\B*
and that's it.

Example:
A= rand(4,4);
Xo = rand(4,1);
B = A*Xo;
X = A\B;
X-Xo

--> A= rand(4,4);
--> Xo = rand(4,1);
--> B = A*Xo;
--> X = A\B;
--> X-Xo
  ans  =
    0.
    0.
    2.220D-16
   -3.053D-16

Samuel

Le 20/06/2016 17:53, Claus Futtrup a écrit :
>
> Hi there
>
> I've downloaded Scilab 6 beta 2 (Windows 7, 64 bit, Intel MKL) for 
> testing.
>
> Today I use a Scilab ATOMS module named linalg ... 
> https://atoms.scilab.org/toolboxes/linalg/0.3.2/
>
> In my case it's good for solving a linear algebra problem (A*X = B) 
> based on gauss elimination. It uses an input vector and a matrix - it 
> looks like this:
>
> x = linalg_dgesv(mat,x);
>
> The big question is - will I also need DGESV from the Linalg ATOMS 
> toolbox with Scilab6? (Or will Scilab6 do better than Scilab5 and 
> solve this problem without a toolbox - how? - Searching Scilab6 help 
> for DGESV didn't give any hits).
>
> More info:
>
> https://software.intel.com/sites/products/documentation/doclib/mkl_sa/11/mkl_lapack_examples/dgesv.htm
>
> Best regards,
>
> Claus
>
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