Reduce array's dimension by one in Numpy

To reduce array’s dimension by one, use the np.ufunc.reduce() method in Python Numpy. Here, we have used multiply.reduce() to reduce it to the multiplication of all the elements.

The numpy.ufunc has functions that operate element by element on whole arrays. The ufuncs are written in C (for speed) and linked into Python with NumPy’s ufunc facility. A universal function (ufunc) is a function that operates on ndarrays in an element-by-element fashion, supporting array broadcasting, type casting, and several other standard features. That is, a ufunc is a “vectorized” wrapper for a function that takes a fixed number of specific inputs and produces a fixed number of specific outputs.

Steps

At first, import the required library −

import numpy as np

Create a 1D array −

arr = np.array([7, 14, 21, 28, 35]) 

Display the array −

print("Array...
", arr)

Get the type of the array −

print("
Our Array type...
", arr.dtype) 

Get the dimensions of the Array −

print("
Our Array Dimensions...
",arr.ndim)

To reduce array’s dimension by one, use the np.ufunc.reduce() method in Python Numpy. Here, we have used multiply.reduce() to reduce it to the multiplication of all the elements −

print("
Result (multiplication)...
",np.multiply.reduce(arr)) 

To reduce array’s dimension by one, use the np.ufunc.reduce() method in Python Numpy. Here, we have used add.reduce() to reduce it to the addition of all the elements −

print("
Result (addition)...
",np.add.reduce(arr))

Example

import numpy as np # The numpy.ufunc has functions that operate element by element on whole arrays. # ufuncs are written in C (for speed) and linked into Python with NumPy’s ufunc facility # Create a 1D array arr = np.array([7, 14, 21, 28, 35]) # Display the array print("Array...
", arr) # Get the type of the array print("
Our Array type...
", arr.dtype) # Get the dimensions of the Array print("
Our Array Dimensions...
",arr.ndim) # To reduce array’s dimension by one, use the np.ufunc.reduce() method in Python Numpy # Here, we have used multiply.reduce() to reduce it to the multiplication of all the elements print("
Result (multiplication)...
",np.multiply.reduce(arr)) # To reduce array’s dimension by one, use the np.ufunc.reduce() method in Python Numpy # Here, we have used add.reduce() to reduce it to the addition of all the elements print("
Result (addition)...
",np.add.reduce(arr))

Output

Array... [ 7 14 21 28 35] Our Array type... int64 Our Array Dimensions... 1 Result (addition)... 105