NumPy - Save array to file and load array from file
NumPy - Reshape array
NumPy - Array with zeros
NumPy - Array with ones
NumPy – Initialize array with a range of numbers
NumPy – Access array elements using index
NumPy - Get specific row
NumPy – Get array shape
NumPy – Get array size
NumPy - Iterate over array
NumPy - Duplicate or copy array to another array
NumPy - Concatenate arrays
NumPy - Reverse array
NumPy – Stack arrays vertically
NumPy – Stack arrays horizontally
NumPy – Split array into smaller arrays
NumPy - Array Slicing
NumPy – Array dot product
NumPy – Array cross product
NumPy Mathematical Functions
NumPy sqrt()
NumPy max()
NumPy amax()
NumPy Statistical Functions
NumPy sum()
NumPy average()
NumPy mean()
NumPy median()
NumPy std()
NumPy var()
NumPy Conversions
Convert NumPy Array to List
Convert List to NumPy Array
NumPy Logic Functions
NumPy all()
Numpy Array - Add a constant to all elements of the array
Adding a constant to a NumPy array is as easy as adding two numbers.
To add a constant to each and every element of an array, use addition arithmetic operator +. Pass array and constant as operands to the addition operator as shown below.
output = arr + c
where
arr is a numpy array.
c is a constant.
output is the resulting numpy array.
Examples
1. Add a constant of 3 to each element in the array
In the following python example, we will add a constant 3 to an array arr. The resulting array is stored in output and print to the standard output.
Python Program
import numpy as np #2D array arr = (np.arange(8)*2).reshape(2,4) #print array print("The array\n", arr) #adding a constant to all the elemnets of array output = arr + 3 print("\nAfter adding a constant to all the elemnets of array\n", output)
Output
Summary
In this NumPy Tutorial, we learned how to add a constant to each of the element in numpy array using addition operator.
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