sample() function in NumPy array

Introduction

Generating random numbers is a fundamental aspect of many computational tasks, including simulations, data analysis, and machine learning. NumPy, a powerful library for numerical computing in Python, provides the random_sample() function to generate random floating-point numbers. In this blog, we'll explore how to use this function effectively.

What is random_sample()?

The numpy.random.random_sample() function returns random floats in the half-open interval [0.0, 1.0). It can generate a single random float or an array of random floats, depending on the shape specified.

Syntax

numpy.random.random_sample(size=None)

• size: Optional. The shape of the output array. If not specified, a single float is returned.

Examples

1. Generating a Single Random Float

import numpy as np

value = np.random.random_sample()
print("Random float:", value)

Output:

Random float: 0.123456789

2. Generating a 1-D Array of Random Floats

import numpy as np

array_1d = np.random.random_sample(5)
print("1-D Array:", array_1d)

Output:

1-D Array: [0.234 0.567 0.890 0.123 0.456]

3. Generating a 2-D Array of Random Floats

import numpy as np

array_2d = np.random.random_sample((2, 3))
print("2-D Array:\n", array_2d)

Output:

2-D Array:
[[0.789 0.012 0.345]
 [0.678 0.901 0.234]]

Use Cases

The random_sample() function is useful in various scenarios:

• Simulations: Generating random numbers for Monte Carlo simulations.
• Data Analysis: Creating random datasets for testing algorithms.
• Machine Learning: Initializing weights in neural networks.
• Statistical Modeling: Sampling from a uniform distribution.

Conclusion

The random_sample() function in NumPy is a simple yet powerful tool for generating random floating-point numbers. By understanding its syntax and applications, you can effectively incorporate it into your computational tasks.