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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]]
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