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What Digital (eBook) and Print sales look like for a computer programming book

If you ever wondered what Digital and Print book sales look like for a technical book (a computer programming book, in this case), here you go. This is a slightly cleaned up chart that O’Reilly provides to me for sales of the Scala Cookbook over time, showing eBook sales vs the printed book sales.

A large collection of Gnuplot examples

I needed to use Gnuplot a little bit over the last few days, mostly to create 2D line charts, and these are my brief notes on how to get started with Gnuplot. If you haven’t used it before, it’s a pretty amazing tool.

Jumping right in ...

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Installing gnuplot

Use MacPorts or Homebrew to install Gnuplot on Mac OS X systems:

port install gnuplot
brew install gnuplot
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Sample data files

My examples use the following 2-column and 4-column data files:

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Is the "War on Drugs" working?

This article shares the graph shown that says the “War on Drugs” isn’t working. That appears to be true, but unfortunately you can’t really know that it’s true because there is no control group. What I mean is that we have no idea what the drug addiction rate would be like if we had not spent all this money on this so-called war. Maybe the rate would be 1.3%, or maybe it would be 5%; we don’t know.

Sencha chart and graph examples

I still have a hard time finding what I want on the Sencha website, so I’m trying to add links here to make their documentation and examples easier for me to find. Here are two examples of the charts and graphs that they offer. This first set of Sencha chart examples comes from this link: