Phone Drive Navigation

What is a-GPS?

Assisted GPS is used by most mobile phone devices. It can help improve GPS in poor signal conditions. But what is it? How does it work? The acronym stands for assisted global positioning system. a-GPS can help improve GPS in …

Cat Film

Quicktime to AVI converter for free

Make a directory called temp. Let’s put it on the Desktop. Put the Quicktime movie you’d like to convert in the new temp directory. Download a 32-bit version of ffmpeg from here: http://ffmpeg.zeranoe.com/builds/win32/static/. Decompress the 7z file. You may need to …

Laptop Hand

Vi Help

New to Vi? Vi (pronounced vee-eye) is a text editor. It allows you to edit files interactively and visually see the changes at the same time. The original Vi is a modal editor consisting of two modes: normal mode and …

Pencil Tip

Vim line

To show line numbers, type: Hit ENTER. You can also use the abbreviated command: To hide line numbers, type: To line wrap, type: To remove line wrap, type: To determine the line count, go to the end of the file …

Gadget Graph

What is an exchangeability martingale?

Exchangeability martingales can be used to find strange or odd data points. The mechanics of exchangeability martingales is still a bit of a mystery to me. However, posted below are the basic components and how each step gets us to …

Broken Chain

Broken link checker analysis with R

You’ve found a few broken links on your blog or web site, and now you wonder whether there are more. Here’s a quick way to get a sense of how big the problem is. You could basically take 2 different …