Data Cleansing Master Class in Python

Welcome to Data Cleansing Master Class in Python.

Data preparation may be the most important part of a machine learning project. It is the most time consuming part, although it seems to be the least discussed topic. Data preparation, sometimes referred to as data preprocessing, is the act of transforming raw data into a form that is appropriate for modeling.

Machine learning algorithms require input data to be numbers, and most algorithm implementations maintain this expectation. Therefore, if your data contains data types and values that are not numbers, such as labels, you will need to change the data into numbers. Further, specific machine learning algorithms have expectations regarding the data types, scale, probability distribution, and relationships between input variables, and you may need to change the data to meet these expectations.

In the course you’ll learn: 

The importance of data preparation for predictive modeling machine learning projects.

How to prepare data in a way that avoids data leakage, and in turn, incorrect model evaluation.

How to identify and handle problems with messy data, such as outliers and missing values.

How to identify and remove irrelevant and redundant input variables with feature selection methods.

How to know which feature selection method to choose based on the data types of the variables.