Building confidence in a decision — Table of Contents What, why, when Experimental Design 1. Choose the one variable to be tested 2. Define the key metric 3. Estimate the sample size 4. Perform a statistical analysis of the metrics gathered Common pitfalls Conclusion This post is part of a blog series on A/B Testing in the context of…

What should we do about them? — Wait what? 😱 What do you mean Machine Learning Algorithms do not understand categorical variables? Aren’t they supposed to be intelligent? I don’t want to be a mood killer, but… they don’t. …

Do we really know everything about K-Means? Clustering is not new to the Machine Learning neighborhood, but it will definitely never get old. Grouping data points with similar traits into clusters without knowing their corresponding labels, or any other prior information for that matter, sounds pretty cool to me. …

3 Embedded-based methods to choose relevant features — Table of contents Embedded Methods LASSO Feature Importance Conclusion This post is the third and last part of a blog series on Feature Selection. Have a look at Filter (part1) and Wrapper (part2) Methods. Embedded Methods Embedded methods combines the advantageous aspects of both Filter and Wrapper methods. If you take a closer look into…

5 Wrapper-based methods to choose relevant features — Table of contents Wrapper Methods Forward Selection Backward Elimination Boruta Genetic Algorithm This post is the second part of a blog series on Feature Selection. Have a look at Filter (part1) and Embedded (part3) Methods. Wrapper Methods

4 Filter-based methods to choose relevant features — Table of Contents What, When & Why Filter Methods - Pearson’s Correlation - LDA - ANOVA - Chi squared What about non-linear relationships? PCA is not Feature Selection Feature Selection #NOT Feature Selection is a very popular question during interviews; regardless of the ML domain. This post is part of a blog series…

A guide for choosing the best among a collection of algorithms (Theory & Code). — Let’s imagine that you have to buy a car. The first thing would be to look at your options; I guess they will be more than one. After thorough thinking, you probably create a list of 5 cars. What is the next step? How would you choose which one to…