Importance of Feature Scaling in Data Modeling (Part 1)

In data science, one of the challenges we try to address consists on fitting models to data. The objective is to determine the optimum...

Displaying Images in Tableau (with some help from Python)

One of the cool things you can do with Tableau is define every pixel from an image. This allows you to create interesting visualizations...

Why you should be careful when averaging percentages

A common mistake I often observe in data analysis is the averaging of percentages. To explain this concept let’s examine a simple...

Plotting Functions – Part 2: Using Polar Coordinates

This is part 2 of a post where we demonstrate how to plot functions in Tableau. Part 1 can be seen here. In this section we are focused...

Plotting Functions – Part 1: Using Cartesian Coordinates

In this post, we will demonstrate a method for plotting two-dimensional functions in Tableau. We will present examples in both Cartesian...

Create Map Paths Using Great Circles

A typical map is a two-dimensional representation of a three-dimensional sphere. When we draw paths, we know that the shortest distance...

3D Drawings with Stripes

Artists are capable of drawing images that are perceived as three-dimensional (3D) on a two-dimensional (2D) canvas, such as a piece of...

How to Make Circular and Polygon Radial Charts

I recently got inspired from viewing a dashboard designed by Adam Crahen, where he created a Circular Radial Chart based on data about...

Become A US President With Only 22% Of The Popular Vote

In the US, the electoral college drives the presidential election. A candidate will win an election if they obtain more than half of the...

Drawing with Straight Lines

What if we could only draw straight lines on a canvas? Could we be able to create art under such a constraint? A few weeks ago, I came...