Re: Octave/C++ matrix Inv() comparison

[mtall]

You may wish to use the Armadillo library, which provides an inv() function
in C++, instead of writing your own.  Have a look at:
http://arma.sourceforge.net/docs.html#inv

Armadillo uses LAPACK for inv(), so it will provide the same answer as
Octave. To see how inv() is implemented, have a look at Armadillo's source. 
The related functions are in the "include/armadillo_bits/auxlib_meat.hpp"
file, within the Armadillo archive, which you can get from:
http://arma.sourceforge.net/download.html



ionone wrote
> Also to do it simpler, here are the numbers in a 20x20 matrix in Octave
> and in C++
> 
> the funny thing is that when i take the inverse in octave, ihave the exact
> answer, but if i take the inverse with Lapack i have something totally
> different...Not even close as before. Dunno...





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