Latest Posts | By jenholm

Open ** ~/.vnc/xstartup** file

$ nano ~/.vnc/xstartup

Add the lines in the file.

#!/bin/sh xrdb $HOME/.Xresources xsetroot -solid grey # fix to make xfce work: startxfce4 &

Save and exit.

In case you’re using the book in the title, here’s the fix for the Chapter 3 MNIST dataset hang

- Download by clicking on the view raw dataset from https://github.com/operalib/operalib/blob/master/mnist/mldata/mnist-original.mat
- Use …

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2 months ago
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Build your own discrete event simulation framework in Python Part III

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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2 months ago
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Build your own discrete event simulation framework in Python Part II

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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2 months ago
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Build your own discrete event simulation framework in Python Part I

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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2 months ago
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Excel to R Transhipment Problem Optimization Tutorial Part II

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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3 months ago
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Excel to R Transhipment Problem Optimization Tutorial Part I

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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4 months ago
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The Analyst’s Dilemma, R vs. Python, or How I Stopped Worrying and Hated Them Both

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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4 months ago
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Crime Analysis Series: Manhattan Distance in R

As you can see in the image embedded in this page, travel from downtown Phoenix to downtown Scottsdale involves several rectangular-like movements. Traveling in a city laid out in a …

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4 months ago
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Crime Analysis Series Calculating Great Circle Distance Between Two Points in R Using Haversine Formula

I recently started working in crime analysis and started to need to use latitudes and longitudes and calculate the distances between them. For this calculation I used the Haversine formula …

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