python - Can I get the matrix determinant using Numpy?

Question

I read in the manual of Numpy that there is function det(M) that can calculate the determinant. However, I can't find the det() method in Numpy.

By the way, I use Python 2.5. There should be no compatibility problems with Numpy.

Answer 1

You can use numpy.linalg.det to compute the determinant of an array:

In [1]: import numpy

In [2]: M = [[1, 2], [3, 4]]

In [3]: print numpy.linalg.det(M)
Out[3]: -2.0000000000000004