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Posts in the “technology” category

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 ...

Installing gnuplot

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

port install gnuplot
brew install gnuplot

Sample data files

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

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Radio Pi (formerly “Al Radio”)

I’ll write more about this as time goes on, but I’ve finished the first round of software (and hardware) development on my “Radio Pi” project (which, thanks to a friend, I now refer to as my “RadioPi” system). This project lets me play local FM radio stations, online radio streams, recorded radio streams, and podcasts, all from a little Raspberry Pi (RPI) computing system.

Video

First, here’s a short video of my RPI Radio in action:

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On Twitter privacy settings and personalized ads

I don’t know if it was just coincidence, but I went to Lowe’s yesterday for the first time in seven months, then I had a Lowe’s ad on Twitter first thing this morning. So “Allow some” is now “Off.” (See the Location and Personalization settings in the images.)

Amazon Kindle eBook cover specifications (height and width size requirements)

I'm in the process of publishing my second eBook for the Amazon Kindle, and one thing that's currently hard to find on the Amazon website is what the eBook cover height and width size specifications are. You can currently only find this information when you get ready to publish your book.

So, as a brief public service, as of May, 2012, here are the Amazon Kindle eBook cover height and width specifications, courtesy of the Amazon KDP book publication website:

Why Siri is bad (and Apple is behind Amazon and Google)

While it’s old news (March, 2018), I’ve often wondered why Siri seems to be getting worse, and how/why Amazon and Google beat Apple to the market for Alexa-like assistants. MacRumors has this article where they report several of the problems related to Siri’s development. (Their article is based on an article written by The Information, which requires a subscription.)

Revenue per employee in the computer industry

As I get ready to release my new website on How I Sold My Business, I did some research on revenue per employee, specifically revenue per employee in the computer services industry.

As it turns out, there are all sorts of good information sites on the internet. Probably the most consistent source of information is the Fortune Magazine site, specifically these two links:

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