Filter frequency about kalman

[bachagas]

Hi,
I am sorry for the delay... It's been some time since the last time I played with it, but from what I could remember, you need to find the appropriate values for the parameters when you create the filter:

Kalman myFilter(0.125,32,1023,0); //suggested initial values for high noise filtering

If the first two parameters are too high, it will filter too much and you lose responsiveness.
I remember I plotted the input and the filtered input and tested until I found a good output.
The method:

myFilter.setParameters(double process_noise, double sensor_noise, double estimated_error)

may be useful for making these tests.
You should also read the link from where I took the original implementation: http://interactive-matter.eu/blog/2009/12/18/filtering-sensor-data-with-a-kalman-filter/
Maybe you get some insights from there too.
Hope that helps!