Machine learning actual Combat reading notes (i) Machine learning basics

http://sourceforge.net/projects/numpy/files/download the corresponding version of the NumPy, everywhere, find a not python2.7

Use Pip, please.

Pip Install NumPy

Download finished, the hint does not install C + +, meaning is also to install VS2008, but installed is VS2012, had to download a VC for Python

http://www.microsoft.com/en-us/download/confirmation.aspx?id=44266

Re-pip, wait for the most of the day, the final count is successful

Input command introduced NumPy

From numpy Import *

Operation:

Input

Random.rand (bis)

Transition to Matrix

Randmat=mat (Random.rand (bis))

To find the inverse of a matrix

Randmat.i

Save it to a variable.

Invrandmat=randmat.i

Multiply, the result should be the unit matrix, that is, the diagonal full 1, the others are 0

Randmat*invrandmat

Eye function to create a 4*4 unit matrix

Machine learning actual Combat reading notes (i) Machine learning basics