How do I convert a list of lists into a numpy matrix?

Question

I want to convert a list of lists into a numpy matrix and then transpose it. How can I do this?

Answer 1

Simply use np.array

x = [[1,2,3,4,5],[1,2,3,4,5],[1,2,3,4,5]]

a = np.array(x)

a.transpose()

Out: 
array([[1, 1, 1],
       [2, 2, 2],
       [3, 3, 3],
       [4, 4, 4],
       [5, 5, 5]])

Answer 2

Try this:

import numpy as np
from pprint import pprint

a = [[0.2, 0.4],[0.4, 0.6],[0.4, 0.6],[0.20, 1.]]
pprint(a)

b = np.array(a)
b_t = b.T

pprint(b)
pprint(b_t)

The output is:

[[0.2, 0.4], [0.4, 0.6], [0.4, 0.6], [0.2, 1.0]]
array([[0.2, 0.4],
       [0.4, 0.6],
       [0.4, 0.6],
       [0.2, 1. ]])
array([[0.2, 0.4, 0.4, 0.2],
       [0.4, 0.6, 0.6, 1. ]])