How to convert numpy array elements from string to int

Question

I have a list of numbers in string format. I converted that list into numpy array using np.asarray().

How do I convert the string elements to ints?

[`np.asarray(listx, dtype = int)`](https://docs.scipy.org/doc/numpy/reference/generated/numpy.asarray.html)? Given that the strings are integers. — Mr. T, Jan 22 '18 at 21:07
Possible duplicate of [Convert all strings in a list to int](https://stackoverflow.com/questions/7368789/convert-all-strings-in-a-list-to-int) — zipa, Jan 22 '18 at 21:14
@zipa I have tried 'map' to convert but it's completing my purpose. — Uddesh Jain, Jan 22 '18 at 21:22

score 3 · Answer 1 · edited Dec 21 '19 at 20:00

3

If you have x = np.matrix, where each element is '1.0' (as str) and you want to convert it to int or float:

x = x.astype(np.float)

edited Dec 21 '19 at 20:00

Adrian Mole

answered Dec 21 '19 at 19:33

score 2 · Answer 2 · edited Dec 24 '20 at 10:01

2

import numpy as np
nums_str = ['1','23','345']
nums_str_np = np.asarray(nums_str)
nums_int_np = nums_str_np.astype('int')

nums_int_np - is now np array of integers.

edited Dec 24 '20 at 10:01

thepunitsingh

answered Dec 22 '20 at 13:58

2 Answers2