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)? Given that the strings are integers. — Mr. T
– Mr. T, Commented Jan 22, 2018 at 21:07
@zipa I have tried 'map' to convert but it's completing my purpose. — Uddesh Jain
– Uddesh Jain, Commented Jan 22, 2018 at 21:22

Adrian Mole · Accepted Answer · 2019-12-21 20:00:30Z

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)

Adrian Mole

52.1k193 gold badges61 silver badges101 bronze badges

answered Dec 21, 2019 at 19:33

5762 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

thepunitsingh · Accepted Answer · 2020-12-24 10:01:52Z

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.

thepunitsingh

7412 gold badges14 silver badges32 bronze badges

answered Dec 22, 2020 at 13:58

5762 silver badges13 bronze badges