Re: [Discuss-gnuradio] Gaussian elimination or matrix inversion (solving a linear system) in GNURADIO

[Patrik Tast]

Hi,

Do a search on "FEM", Finite Element Method.
Today there are tons of example code using Gaussian elimination.

My Masters Thesis (1990:s) was solving any 2D/3D Trusses using FEM.
It took me less than 50 lines of C code and could solve >20k unknowns.

Note: The matrix will be 1/2 full of zeros. To save mem and computing
time use the "Band matrix" method. Singular if the (top-left ->
bottom->right) diagonal include zero values.
http://en.wikipedia.org/wiki/Band_matrix

Good luck,
Patrik

On Sun, 2014-01-05 at 10:06 +0100, Martin Braun wrote:
> On 01/04/2014 01:08 PM, Marcus Müller wrote:
> > Hi Nasi,
> > 
> > GNU Radio itself is not a math system. That being said, there are
> > several math frameworks for C++ and Python; furthermore, if you're
> > writing your own Python blocks, your work parameters are usually numpy
> > ndarrays, and numpy (together with scipy in general) gives you
> > functionality very similar to Matlab with respect to matrix operations.
> > See the Numpy and Scipy references for further information.
> 
> Remember that solving a set of linear eqs. is equivalent to a
> matrix/vector multiplication.
> 
> MB
> 
> 
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