It can be done as Matt Shottwell showed with his home made ECG and a patched version of R at useR! 2011. However, there are other options as well and here I will use an Arduino. The Arduino is an open-source electronics prototyping platform. It has been around for a number of years and is very popular with hardware hackers. So, I had to have a go at the Arduino as well.
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| My Arduino starter kit from oomlout |
The example I will present here is silly - it doesn't do anything meaningful and yet I believe it shows the core building blocks for future projects: Read an analog signal into the computer via the Arduino, transform it with R through Rserve and display it graphically in real time. The video below demonstrates the final result. As I turn the potentiometer random points are displayed on the screen, with the standard deviation set by the analog output (A0) of the Arduino and fed into the
rnorm function in R, while at the same time the LED brightness changes.Read more »
