How to Calculate Conditional Probabilities from Any DataFrame in 3 Lines of Code

Author:Murphy  |  View: 26743  |  Time: 2025-03-23 19:50:46
Photo by Dan Cristian Pădureț on Unsplash

Background

As I have continued to delve into causal inference I reached a stage where I needed to be able to construct formulas that use complex combinations of conditional probabilities and the code was starting to be difficult to read and maintain. This led to me developing a simple way to calculate conditional probabilities.

By the end of this article you will be equipped with a short Python function that can apply a conditional probability directly to a any pandas DataFrame and return the result.

A Recap

Conditional Probability is the probability of an event occurring given that another event has already occurred. The notation

Tags: Conditional Probability Data Science Probability Programming Python

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