This is the third in my series about how I built my animated dashboard about Fourier Series: By the end of the last post, I had built up the SIN wave graph (bottom-right in the dashboard) and the waterfall chart (not visible above). In this post, I’ll go through the steps for creating all of the elements in the main graph at the bottom of the dashboard, which I simply called “Circles”. The components of this can individually be turned…
This is the second in my series about how I built my animated dashboard about Fourier Series: Seeing the SINs The basis and indeed the whole point of the dashboard are the calculations needed for the SIN graph. Here shown for the square wave: The whole idea with a Fourier series is that different SIN waves, all at different frequencies and amplitudes according to the equation below, add up to form a square wave with an amplitude of 2 (-1…
This is the first entry in this series Making waves with Fourier Series, Part 1 Making waves with Fourier Series, Part 2 As you will have seen from some of my previous posts and dashboards, I rather like combining maths and Tableau. That was the main motivation form the 3d rotating cube. This time I was inspired by a video about visualising how Fourier Series work by Destin Sandin on his Smarter Every Day channel. Click on the screenshot below…
A fun little challenge this week from Luke. It was one of those where if you hadn’t already worked with certain concepts, it would be really difficult, but not too bad if you had. Fortunately, I had and when I saw the challenge, I knew I wouldn’t have too much trouble (in principle!) It also had the benefit, that the difficulty was in the concept, so it’s pretty quick to build if you already know the techniques. In essence, this…
Can you compare a 3-day vs. 14-day moving average and describe the latest trend? Ann’s challenge this week is based on COVID-19 data and is an exercise in table calculations. Excellent! I feel I’m slowly getting to grips with these, so I’m intrigued to see how I get on. The core challenge is to calculate 3-day and 14 day moving averages and to compare them. Ann’s challenge on Workout WednesdayThe official solution by Jami Delagrange on Tableau Public My solution:…