determinant

[side cap]

Hello,

i cannot find determinant in DoubleMatrix in 1.2.4 version ?

thxs for your help.

[Mikio Braun]

Hi side cap,

Currently, there is no such method, unfortunately. However, you can
compute them using QR or LU decompositions, especially when you need
the absolute value, this is pretty straightforward. For example, you
compute the QR decomposition and then, the absolute value of the
product of diagonal elements of R is the determinant.

If also want the correct sign, things get a bit more difficult, and i
couldn't quickly see just how that is exactly done.

Hope this helps for now,

-M

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Mikio Braun - http://blog.mikiobraun.de, http://twitter.com/mikiobraun