How to split a 2D array in Numpy
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Overview
In Python, an array is a data structure used to store multiple items of the same type. Arrays are useful when dealing with many values of the same data type. An array needs to explicitly import the array module for declaration.
A 2D array is simply an array of arrays.
The numpy.array_split() method in Python is used to split a 2D array into multiple sub-arrays of equal size.
Parameters
array_split() takes the following parameters:
array(required): Represents the input array.indices_or_section(required): Represents the number of splits to be returned.axis(optional): The axis along which the values are appended.
To split a 2D array, pass in the array and specify the number of splits you want.
Example
Now, let’s split a 2D array into three sections or indices.
Code
import numpy as nparray1 = np.array([[1, 2], [3, 4], [5, 6], [7, 8], [9, 10]])# splitting the array into three indexesnew_array1 = np.array_split(array1, 3)print('The arrays splitted into 3 sections are:', new_array1)
Explanation
- Line 1: We import the
numpymodule. - Line 3: We create an array
array1. - Line 5: We use the
numpy.array_split()method to split the given array into three sections, and then assign the result to a variable namednew_array1. - Line 6: We print the split 2D array,
new_array1.
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