The Neocortex & Power Iteration

A look at how the power iteration method for computing eigenvectors may allow brains to extract variance from the world.

Composition

This post looks at composition. It starts with Lego. It then looks at a theory of why deep neural networks work and how they could be trained. It ends on how brains may embody these theories.

Making Proper Histograms with Numpy and Matplotlib

How do you build proper histograms in Python?

Getting All the Books

This is a short post explaining how to obtain over 50,000 text books for your natural language processing projects. The source of these books is the excellent Project Gutenberg. Project Gutenberg offers the ability to use sync the collection of books. To obtain the collection you can set up a private mirror as explained here. … Continue reading Getting All the Books →

Accessing Our Sensor Data: PHP + SQLite + SVG

So we have our sensor(s) dutifully logging their data to an SQLite database. Now we need to process and view this data. LASP First we need to set our Raspberry Pi up as a webserver. This typically requires: Linux, Apache, MySQL and PHP - a LAMP framework. There is a handy guide: here (thanks Dave!). … Continue reading Accessing Our Sensor Data: PHP + SQLite + SVG →

OCR Meter Readings using Raspberry Pi?

I have a wireless energy meter and thermostat at home. I could try to hack them, taking them apart and listening to certain key voltages. However, the circuits are likely small and breakable. And I would like to use the units again and not pay for replacements. So I was wondering whether I could cheat … Continue reading OCR Meter Readings using Raspberry Pi? →