Data Science Blog

An interesting tutorial at looking at breaks in the bond market using R and time series analysis:

https://www.datasciencecentral.com/profiles/blogs/co-integration-and-structural-breaks-time-series-analysis-using-r

O’Reilly article on organizational handing of mathematical models, a topic that is not covered enough in my opinion:   https://www.oreilly.com/ideas/what-are-model-governance-and-model-operations?fbclid=IwAR2HXtnERk_Kn5RQ85N0fHqcxTpRtp8yjIbmXWPVjAyAKDjndBUI-MuaoDk

In this post, I’m going to use R to scrape Indeed.com for some jobs, then plot the positions of the top jobs on a map, and save that map to …
Read More

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 …
Read More

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 …
Read More

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 …
Read More

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 …
   Read More

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 …
Read More

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 …
Read More

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. …
Read More