Data Science Blog

I was recently forced at gunpoint to estimate the positions of mileposts along the highways in Maricopa County. This was to estimate stops and arrest positions for law enforcement. Like …
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I recently needed to process a bunch of addresses that our proprietary geocoding software was having a problem with. I won’t say the name of the geocoder, but it rhymes …
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An R function I had to write to calculate the true course/bearing between two lat lon positions. Note that the fossil R library has a function called earth.bear to do …
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In case you’re using the book in the title, here’s the fix for the Chapter 3 MNIST dataset hang

1. Download by clicking on the view raw dataset from https://github.com/operalib/operalib/blob/master/mnist/mldata/mnist-original.mat
2. Use …
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In Part II, we added a queue and a PatrolCar class to our Python simulation to answer call events in our police patrol simulation. In this installment, we’ll add calls to …
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In Part I, we learned about creating a simple discrete event simulation controller in Python, using a clock that iterated over a minute counter and translated this minute counter to …
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The first question you might ask, is why the heck would you build your own simulation framework in Python? There’s a million of them, right?

I wouldn’t say a million. …
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In this tutorial, I’ll finish the process of converting a simple Excel Transshipment problem that I wrote to minimize the traveling distance that a set of patrol cars would have …
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In this tutorial I’m going to go through creating an optimization model in Excel. The next part of the tutorial will be scaling a small optimization program into a larger …
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I recently worked on two analytic projects which had libraries which were crucial to the completion of the projects, which I like to call putting all your eggs in one …
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