Feature request: graph smoothing

[davidedelvento]

It would be nice if the graphs (e.g. speed-time) would have a checkbox (or a global setting) to enable smoothing and use e.g. a moving average, exponential decay, or some other clever way. And for #26 I care only about smoothing the speed and altitude data, however it may be useful for other purposes to smooth also the track data itself, see e.g. https://stackoverflow.com/questions/1134579/smooth-gps-data

As I wrote in #26 I'm open to implement this myself, given some simple guidance on how would be best to proceed.

[EtherGraf]

The keyword you are possibly looking for is the Douglas-Peucker Algorithm.
It is used in many other gps tools and works quite well.