Publications by Jimmie
R Script to retrieve data from Strava
I wanted to have a general and standardized data set on which I base my scripts which try to visualize my sporting activities. This data set should be easy to update, and should be called from other scripts. For this I took a two step approach: first retrieve all available data from Strava using the excellent rStrava package which calls the Strav...
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Running pace and distance over time
While running for a couple of years now (since 2004) I wanted to see if there is some progress in speed and distance. I didn’t log much in the beginning, no notebook or anything like that, but around 2010 I purchased my first GPS watch. This enables automatic logging! Anyway, this is the result of 10 years of running: Below code demonstates ho...
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Run the City Challenge with R
My lovely wife wanted to start a new running challenge: Run all the streets in a city in one year. Interesting of course, but how do you track the streets that you already visited? You could of course use the heatmapping functions on various websites like Strava, Citystrides or Veloviewer for this. I tried to create something myself using R. Firs...
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Riding Watopia
When it’s raining or when it’s just cold outside, I like to ride on Zwift. I especially like Watopia. Let’s see what can be done with the FIT files that are generated. Via the Zwift dashboard you can download the FIT file which is created after each ride. It’s also located on your PC/Mac. Getting the dataBasic plots of route and height p...
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Kudos, more is better!
One in the category of Silly Statistics: Yes, I have finished a run, ride or another sporty activity. Let’s share on Strava and hope that people like it and give me kudos. More is better (less is not more in this case). Anyway, let’s see if our popularity increases over time. If our star is rising. As usual I start with a data frame with my ...
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Central Limit Theorem
The Central Limit Theorem (CLT) is an important theory in statistics. It basically says that you can use all statistical tools and methods that assume a normal distribution on a sample of the full population. It does not matter how the population is distributed (normal, non-normal, uniform, etc.). If you use a large enough sample it will be norma...
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Cool 3D plots
Some time ago I worked with a supplier who creates excellent cooling equipment for industrial use. Basically an impressive watercooler. The cooling capacity of these devices is depending on the temperature outside and of the temperature of the cooling water. This means that the advertised cooling capacity is just an indicative number and that you...
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