Boolean indexing in Pandas filters DataFrame rows using conditions. Example: df[df[‘column’] > 5] returns rows where ‘column’ values exceed 5. Efficiently manage and manipulate data with this method. Here’s an easy example: This code creates a DataFrame with data for four people, then uses boolean indexing to filter out the rows with an age greater … Read more
I rely on spreadsheets every day to manage my business, make informed financial choices, and organize lists that help structure my day. My business simply couldn’t function without the aid of spreadsheets. 📈 Spreadsheets are immensely useful tools for managing and analyzing data. Among their many features, one invaluable capability is 💻 generating sample data … Read more
From April 1st through August 14th, I tracked everything I ate on cronometer.com as part of a weight loss challenge. Overall I lost almost 25 pounds at a rate of 1.2 pounds per week. I always wondered what I could learn if I could scrape that data and get it into a Jupyter Notebook. In … Read more
To convert an integer i to a string with leading zeros so that it consists of 5 characters, use the format string f'{i:05d}’. The d flag in this expression defines that the result is a decimal value. The str(i).zfill(5) accomplishes the same string conversion of an integer with leading zeros. Challenge: Given an integer number. … Read more
The easiest way to extract numbers from a Python string s is to use the expression re.findall(‘\d+’, s). For example, re.findall(‘\d+’, ‘hi 100 alice 18 old 42’) yields the list of strings [‘100′, ’18’, ’42’] that you can then convert to numbers using int() or float(). There are some tricks and alternatives, so keep reading … Read more
📖 Background Many people like to relax or party with a glass of wine. That makes wine an important industry in many countries. Understanding this market is important to the livelihood of many people. For fun, consider the following fictional scenario: 🍷 Story: You work at a multinational consumer goods organization that is considering entering … Read more
This tutorial shows you how I created a model to predict football results using Poisson distribution. You’ll learn how I designed an interactive dashboard on Streamlit where our users can select a team and get to know the odds of a home win, draw, or away win. Here’s a live demo of using the app … Read more
In this blog series, powerful Python libraries are leveraged to help uncover some hidden statistical truths in basketball. The first step in any data-driven approach is to identify and collect the data needed. Luckily for us, Basketball-Reference.com hosts pages of basketball data that can be easily scraped. The processes of this walkthrough can be easily … Read more
In this blog post, we’ll discuss how to normalize a matrix using the popular Python library NumPy. But first things first: 👇 What is Normalization? In mathematics, normalizing refers to making something standardized or regular. Normalization of a matrix is a process of scaling the matrix so that the elements of the matrix have a … Read more
Pandas is a great library for data analysis in Python. With Pandas, you can create visualizations, filter rows or columns, add new columns, and save the data in a wide range of formats. The workhorse of Pandas is the DataFrame. 👉 Recommended: 10 Minutes to Pandas (in 5 Minutes) So the first step working with … Read more
This article will review some of the critical techniques used in Exploratory Data Analysis, specifically for Bivariate Analysis. We will review some of the essential concepts, understand some of the math behind correlation coefficients and provide sufficient examples in Python for a well-rounded, comprehensive understanding. What is Bivariate Analysis? Exploratory Data Analysis, or EDA, is … Read more
NumPy vs Lists NumPy is an important Python library used for numerical operations and data science. Its mathematical operations on arrays are faster and more efficient than on lists. Since NumPy is primarily written in C and C++, it can perform faster operations. NumPy arrays are homogeneous arrays that can store only one type of … Read more