- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Flatten a 2d numpy array into 1d array in Python
A 2d numpy array is an array of arrays. In this article we will see how to flatten it to get the elements as one dimensional arrays.
With flatten
The flatten function in numpy is a direct way to convert the 2d array in to a 1D array.
Example
import numpy as np
array2D = np.array([[31, 12, 43], [21, 9, 16], [0, 9, 0]])
# printing initial arrays
print("Given array:\n",array2D)
# Using flatten()
res = array2D.flatten()
# Result
print("Flattened array:\n ", res)Output
Running the above code gives us the following result −
Given array: [[31 12 43] [21 9 16] [ 0 9 0]] Flattened array: [31 12 43 21 9 16 0 9 0]
With ravel
There is another function called ravel which will do a similar thing of flattening the 2D array into 1D.
Example
import numpy as np
array2D = np.array([[31, 12, 43], [21, 9, 16], [0, 9, 0]])
# printing initial arrays
print("Given array:\n",array2D)
# Using ravel
res = array2D.ravel()
# Result
print("Flattened array:\n ", res)Output
Running the above code gives us the following result −
Given array: [[31 12 43] [21 9 16] [ 0 9 0]] Flattened array: [31 12 43 21 9 16 0 9 0]
Updated on 04-Jun-2020 12:08:28
- Related Questions & Answers
- How to convert a 2D array into 1D array in C#?
- Matrix product of a 2D (first argument) and a 1D array (second argument) in Numpy
- Matrix product of a 1D (first argument) and a 2D array (second argument) in Numpy
- Compute the bit-wise XOR of a 1D and a 2D array element-wise in Numpy
- Compute the bit-wise AND of a 1D and a 2D array element-wise in Numpy
- Compute the bit-wise OR of a 1D and a 2D array element-wise in Numpy
- Scatter a 2D numpy array in matplotlib
- Python - Ways to flatten a 2D list
- Difference Between One-Dimensional (1D) and Two-Dimensional (2D) Array
- Turning a 2D array into a sparse array of arrays in JavaScript
- Transform a masked array into a flexibletype array in Numpy
- Evaluate a 2D Legendre series at points (x, y) with 1D array of coefficient in Python
- Evaluate a 2D Laguerre series at points (x,y) with 1D array of coefficient in Python
- Flatten 2D Vector in C++
- Best way to flatten an object with array properties into one array JavaScript
Advertisements