Book Image

Applying Math with Python - Second Edition

By : Sam Morley
Book Image

Applying Math with Python - Second Edition

By: Sam Morley

Overview of this book

The updated edition of Applying Math with Python will help you solve complex problems in a wide variety of mathematical fields in simple and efficient ways. Old recipes have been revised for new libraries and several recipes have been added to demonstrate new tools such as JAX. You'll start by refreshing your knowledge of several core mathematical fields and learn about packages covered in Python's scientific stack, including NumPy, SciPy, and Matplotlib. As you progress, you'll gradually get to grips with more advanced topics of calculus, probability, and networks (graph theory). Once you’ve developed a solid base in these topics, you’ll have the confidence to set out on math adventures with Python as you explore Python's applications in data science and statistics, forecasting, geometry, and optimization. The final chapters will take you through a collection of miscellaneous problems, including working with specific data formats and accelerating code. By the end of this book, you'll have an arsenal of practical coding solutions that can be used and modified to solve a wide range of practical problems in computational mathematics and data science.
Table of Contents (13 chapters)

Manipulating data in DataFrames

Once we have data in a DataFrame, we often need to apply some simple transformations or filters to the data before we can perform any analysis. This could include, for example, filtering the rows that are missing data or applying a function to individual columns.

In this recipe, we will learn how to perform some basic manipulation of DataFrame objects to prepare the data for analysis.

Getting ready

For this recipe, we will need the pandas package imported under the pd alias, the NumPy package imported under the np alias, and a default random number generator object from NumPy to be created using the following commands:

from numpy.random import default_rng
rng = default_rng(12345)

Let’s learn how to perform some simple manipulations on data in a DataFrame.

How to do it...

The following steps illustrate how to perform some basic filtering and manipulations on a pandas DataFrame:

  1. First, we will create a sample DataFrame...