Title: Apply Operations To Elements
Slug: apply_operations_to_elements
Summary: How to apply operations to elements of an array in Python.
Date: 2017-09-03 12:00
Category: Machine Learning
Tags: Vectors Matrices Arrays
Authors: Chris Albon

Preliminaries



In [1]:

    
# Load library
import numpy as np

Create Matrix



In [2]:

    
# Create matrix
matrix = np.array([[1, 2, 3],
                   [4, 5, 6],
                   [7, 8, 9]])

Create Vectorized Function



In [3]:

    
# Create a function that adds 100 to something
add_100 = lambda i: i + 100

# Create a vectorized function
vectorized_add_100 = np.vectorize(add_100)

Apply Function To Elements



In [4]:

    
# Apply function to all elements in matrix
vectorized_add_100(matrix)









    Out[4]:





array([[101, 102, 103],
       [104, 105, 106],
       [107, 108, 109]])