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Perform Arithmetic Operations on a Numpy Array in Python

by maxguy71

The Numpy module has its own add, subtract, multiply, divide, mod, and remainder functions to perform arithmetic operations on a Numpy Array.

Lets look at an example of this first

Code Example 1

Fairly straight forward, create two numpy arrays and perform arithmetic operations

# Numpy Array Arithemetic Operations
import numpy as np

nparr1 = np.array([10, 20, 30, 40, 50])
nparr2 = np.array([6, 13, 5, 21, 9])

addarr = np.add(nparr1, nparr2)
subarr = np.subtract(nparr1, nparr2)
mularr = np.multiply(nparr1, nparr2)
modarr = np.mod(nparr1, nparr2)
remarr = np.remainder(nparr1, nparr2)
divarr = np.divide(nparr1, nparr2)

print("After arithmetic operations")
print("Array Addition = ", addarr)
print("Array Subtraction = ", subarr)
print("Array Multiplication =  ", mularr)
print("Array Modulus = ", modarr)
print("Array Remainder = ", remarr)
print("Array division = ", divarr)

lets run this and you you should see the following output

>>> %Run numparrayarithmetic1.py
After arithmetic operations
Array Addition = [16 33 35 61 59]
Array Subtraction = [ 4 7 25 19 41]
Array Multiplication = [ 60 260 150 840 450]
Array Modulus = [ 4 7 0 19 5]
Array Remainder = [ 4 7 0 19 5]
Array division = [1.66666667 1.53846154 6. 1.9047619 5.55555556]

Code Example 2

Now lets use built in python arithmetic operators

# Numpy Array Arithemetic Operations
import numpy as np

nparr1 = np.array([10, 20, 30, 40, 50])
nparr2 = np.array([6, 13, 5, 21, 9])


addarr = nparr1 + nparr2
subarr = nparr1 - nparr2
mularr = nparr1 * nparr2
modarr = nparr1 % nparr2
divarr = nparr1 / nparr2

print("After arithmetic operations")
print("Array Addition = ", addarr)
print("Array Subtraction = ", subarr)
print("Array Multiplication =  ", mularr)
print("Array Modulus = ", modarr)
print("Array division = ", divarr)

lets run this and you you should see the following output

>>> %Run numparrayarithmetic2.py
After arithmetic operations
Array Addition =  [16 33 35 61 59]
Array Subtraction =  [ 4  7 25 19 41]
Array Multiplication =   [ 60 260 150 840 450]
Array Modulus =  [ 4  7  0 19  5]
Array division =  [1.66666667 1.53846154 6.         1.9047619  5.55555556]

Link

You can find these examples in the numpy section in our github repository

https://github.com/programmershelp/maxpython/tree/main/numpy

Files are called numparrayarithmetic1 and numparrayarithmetic2

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