Various Consequences

Over the course of a couple posts ( 1 and 2 ) we've shown that you can extend the idea of finite difference approximations to include d...

That's the Python Imaging Library . I demonstrated a couple of edge detection techniques ( gradient and laplacian ) using the PIL to ...

We can use the results from the previous post about complex step finite differences to solve the 2D Laplace's equation. Instead of sol...

In Poor Man's ADC Revisit , I demonstrated gradient based edge detection using Python's Imaging Library to read in a jpg. You can a...

I wrote a bit ago about using a webcam as an analog-to-digital converter . The really quick hack I put together used Octave's built-in...

I wrote a while back about using a complex step to approximate the first derivative of a function. The neat thing being that there was no ...

I just had a pretty neat problem on my Electrodynamics ( course text ) mid-term. The problem is to solve for the electric field for two cha...

My favorite computer algebra system has a new wiki, from the Maxima mailing list (with slight edits to make the links work): I've set u...

The first part of my aeroponics project ( overview ) is turning those blue and red LED Christmas lights into a grow lamp. The basic desig...