M2SCI function

mtlb_eig - Matlab eig emulation function

### Description

Matlab `eig` and Scilab `spec` behave differently in some particular cases:

  - With one input (A) and two outputs (V,D), Matlab and Scilab returned eigen values have opposite signs.

The function `[V,D] = mtlb_eig(A)` is used by `mfile2sci` to replace `>[V,D] = eig(A)` . This function will determine the correct semantic at run time. There is no replacement possibility for it.

Caution: `mtlb_eig` has not to be used for hand coded functions.

### Authors

  V.C.