From: Toon Van Assche <toon.vanassche@gm...>  20121217 17:46:00

Dear all, Running Stage 4.1.1 & Player v.3.1.0svn @ Ubuntu 12.04 LTS. I would like to take the inverse of a nxn matrix to use in my GraphSlam. The issues that I encountered:  .inverse() Eigenlibrary (3.1.2) doesn't allow zero values, returns NaN  The LAPACK (3.4.2) library doesn't allow to use negative values, allows zero values (used this example code http://stackoverflow.com/questions/3519959/computingtheinverseofamatrixusinglapackinc )  Pseudo inversion doesn't seem to allow negative values either  Seldon (5.1.2) wouldn't compile for some reason Did anyone successfully implemented an nxn matrix inversion code that allows negative and zerovalues. Any good library recommendations? All help would be appreciated, Regards, Toon 