Numpy Study Notes (1)

1. Random. Rand (n, n)

Generate a random array of n × n

2. Mat (random. Rand (n, n ))

The mat method can convert an array into a matrix.

3. Mat. I

Calculate the inverse matrix of the matrix mat

4. Eye (4, 4)

Generate n × n unit matrix

# First. pyfrom numpy import * # Build 4x4 Rand matrixprint random. rand (4, 4) print '=============== 'randmat = MAT (random. rand (4, 4) # randmat. I randmatprint 'randmat: 'print randmatprint 'randmat. i: 'print randmat. I # randmat. I solve the inverse of a matrixmyeye = randmat * randmat. iPrint myeye # Eye function create an identity matrix of nprint eye (4, 4)