Andreas Bernauer's personal blog

I needed to plot data from a program in real-time for a demo, that is, as the program generates the data, I wanted it to show in some nice diagram.

A friend pointed me to Visualize real-time data streams with Gnuplot by Thanassis Tsiodras, which is very nice: you specify the number of streams to plot and where to plot them, and feed it with lines like '0:1.23', '1:2.3', etc. defining the data points for the individual streams (here: first point on stream 0 is 1.23, first point on stream 1 is 2.3, etc.).

However, I needed to plot several streams in a single window, which that version lacked. So I extended that program with the ability to plot several streams into a single window (download).

For this, you specify both the number of streams you want to plot and the number of windows you want to show. Furthermore, you specify in which window each stream is plotted. I kept as much as possible of the original command line interface to ease the transition to this new version. The result looks like this:

Johnny Lee strikes again. After using the Wii remote to create a low cost multi-touch whiteboard he uses the Wii remote to implement head tracking and 3D virtual reality. He coupled the Wii remote with a PC and a monitor which displays the 3D world. Thanks to the 3D processors in our brain (and the normal processors in Lees computer), we get an impressive illusion of three dimensionality with objects sticking out of the TV. You can even look into a football stadium as if you look through a window: lean to the right and you see more of the field, lean to the left and you see more of the audience.

However, it works only for a single person (and I guess you need a pretty big TV screen such as the one Lee owns to enjoy this 3D experience. ) Great work!

That's really cool: Johnny Lee uses the Wii remote to create a low-cost multi-touch screen, either on a whiteboard or your laptop or any other surface you like. You can even download his software at his homepage. That's great, check it out!

There's a video at YouTube showing a man who built his little Stonehenge without using modern tools such as iron . I think it's a nice idea and worth considering as the method how people built Stonehenge 4000 years ago.