NumPy Beginner's Guide Second Edition by NumPy. Beginner's Guide 2nd

Author:NumPy. Beginner's Guide 2nd
Language: eng
Format: epub
Publisher: Packt Publishing

What just happened?

We calculated the inverse of a matrix with the inv function of the numpy.linalg package. We checked, with matrix multiplication, whether this is indeed the inverse matrix (see inversion.py).

import numpy as np A = np.mat("0 1 2;1 0 3;4 -3 8") print "A\n", A inverse = np.linalg.inv(A) print "inverse of A\n", inverse print "Check\n", A * inverse

Pop quiz – creating a matrix

Q1. Which function can create matrices?

array

create_matrix

mat

vector

Have a go hero – inverting your own matrix

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