[Numpy-discussion] matrix inversion

jp d yoyoq@yahoo....
Wed Aug 10 19:50:00 CDT 2011


hi,
i am trying to invert matrices like this:
[[ 0.01643777 -0.13539939  0.11946689]
 [ 0.12479926  0.01210898 -0.09217618]
 [-0.13050087  0.07575163  0.01144993]]


in perl using Math::MatrixReal;
and in various online calculators i get 

[  2.472715991745  3.680743681735 -3.831392002314 ]
[ -4.673105249083 -5.348238625096 -5.703193038649 ]
[  2.733966489601 -6.567940452290 -5.936617926811 ]


using python , numpy and linalg.inv (or linalg.pinv) i get  a divergent answer

[[  6.79611151e+07   1.01163031e+08   1.05303510e+08]
 [  1.01163057e+08   1.50585545e+08   1.56748838e+08]
 [  1.05303548e+08   1.56748831e+08   1.63164381e+08]]

any suggestions?

thanks
jpd
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