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numpy.random.rand() in Python - GeeksforGeeks

Last Updated : 08 Mar, 2024

This article provides an in-depth exploration of the `numpy.random.rand()` function in Python. It covers the function's syntax, and definition, and includes illustrative examples with detailed explanations for better understanding.

The numpy.random.rand() function creates an array of specified shapes fills it with random values and generates random numbers with Numpy.

Syntax : numpy.random.rand(d0, d1, ..., dn)

Parameters:

• d0, d1, ..., dn : [int, optional]Dimension of the returned array we require, If no argument is given a single Python float is returned.

Return:

Array of defined shape, filled with random values.

`numpy.random.rand()` in Python is a function from the NumPy library that generates an array of specified shapes and fills it with random values uniformly distributed between 0 and 1. It is commonly used for creating random arrays in various applications such as simulations and machine learning. The function's output is determined by the shape parameters provided.

There are where use cases of numpy.random.rand() for Generating random numbers with NumPy. here we are explaining some advantages of numpy.random.rand() for Generating random numbers with Numpy those are following.

• Randomly Constructing 1D Array 
• Randomly Constructing 2D Array 
• Randomly Constructing 3D Array

In this example The code uses NumPy to generate a 1D array with 5 random values between 0 and 1 using the `numpy.random.rand()` method. The resulting array is printed to the console.

# Python Program illustrating
# numpy.random.rand() method
 
import numpy as geek
 
# 1D Array
array = geek.random.rand(5)
print("1D Array filled with random values :", array);

Output : 

1D Array filled with random values : 
 [ 0.84503968  0.61570994  0.7619945   0.34994803  0.40113761]

In this example This Python code uses the NumPy library to create a 3x4 2D array filled with random values between 0 and 1 using the `numpy.random.rand()` method. The resulting array is then printed to the console.

# Python Program illustrating
# numpy.random.rand() method
 
import numpy as geek
 
# 2D Array   
array = geek.random.rand(3, 4)
print("\n\n2D Array filled with random values : ", array);

Output : 

2D Array filled with random values : 
 [[ 0.94739375  0.5557614   0.69812121  0.86902435]
 [ 0.94758176  0.22254413  0.21605843  0.44673235]
 [ 0.61683839  0.40570269  0.34369248  0.46799524]]

In this example The code uses the NumPy library to generate a 3D array of shape (2, 2, 2) filled with random values between 0 and 1 using the `numpy.random.rand()` method. The resulting array is then printed.

# Python Program illustrating
# numpy.random.rand() method
 
import numpy as geek
 
# 3D Array     
array = geek.random.rand(2, 2 ,2)
print("\n\n3D Array filled with random values : \n", array);

Output : 

3D Array filled with random values : 
 [[[ 0.97942627  0.01068711]
  [ 0.35749073  0.22484643]]
 [[ 0.99733022  0.8029555 ]
  [ 0.44111692  0.90537128]]]

Note : These codes won't run on online IDE's. So please, run them on your systems to explore the working. 

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