Syntax error Matrix product of two arrays in Numpy

Matrix product of two arrays in Numpy

To find the matrix product of two arrays, use the numpy.matmul() method in Python Numpy. If both arguments are 2-D they are multiplied like conventional matrices. Returns the matrix product of the inputs. This is a scalar only when both x1, x2 are 1-d vectors.

The out is a location into which the result is stored. If provided, it must have a shape that matches the signature (n,k),(k,m)->(n,m). If not provided or None, a freshly-allocated array is returned.

Steps

At first, import the required library −

import numpy as np

Create two 2D arrays −

arr1 = np.array([[5, 7], [10, 15]])
arr2 = np.array([[11, 12], [19, 20]])

Display the arrays −

print("Array 1...
", arr1)
print("
Array 2...
", arr2)

Get the type of the arrays −

print("
Our Array 1 type...
", arr1.dtype)
print("
Our Array 2 type...
", arr2.dtype)

Get the dimensions of the Arrays −

print("
Our Array 1 Dimensions...
",arr1.ndim)
print("
Our Array 2 Dimensions...
",arr2.ndim)

Get the shape of the Arrays −

print("
Our Array 1 Shape...
",arr1.shape)
print("
Our Array 2 Shape...
",arr2.shape)

To find the matrix product of two arrays, use the numpy.matmul() method in Python Numpy. If both arguments are 2-D they are multiplied like conventional matrices −

print("
Result (matrix product)...
",np.matmul(arr1, arr2))

Example

import numpy as np

# Create two 2D arrays
arr1 = np.array([[5, 7], [10, 15]])
arr2 = np.array([[11, 12], [19, 20]])

# Display the arrays
print("Array 1...
", arr1)
print("
Array 2...
", arr2)

# Get the type of the arrays
print("
Our Array 1 type...
", arr1.dtype)
print("
Our Array 2 type...
", arr2.dtype)

# Get the dimensions of the Arrays
print("
Our Array 1 Dimensions...
",arr1.ndim)
print("
Our Array 2 Dimensions...
",arr2.ndim)

# Get the shape of the Arrays
print("
Our Array 1 Shape...
",arr1.shape)
print("
Our Array 2 Shape...
",arr2.shape)

# To find the matrix product of two arrays, use the numpy.matmul() method in Python Numpy
# If both arguments are 2-D they are multiplied like conventional matrices.
print("
Result (matrix product)...
",np.matmul(arr1, arr2))

Output

Array 1...
[[ 5 7]
[10 15]]

Array 2...
[[11 12]
[19 20]]

Our Array 1 type...
int64

Our Array 2 type...
int64

Our Array 1 Dimensions...
2

Our Array 2 Dimensions...
2

Our Array 1 Shape...
(2, 2)

Our Array 2 Shape...
(2, 2)

Result (matrix product)...
[[188 200]
[395 420]]
Updated on: 2022-02-07T12:09:20+05:30

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