digital filter functions More...
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Functions | |
| static float | EWMA_filter (float a, float xk, float yk1) |
| static float | EWMA_smoothing (int N) |
digital filter functions
Definition in file filter.h.
| static float EWMA_filter | ( | float | a, | |
| float | xk, | |||
| float | yk1 | |||
| ) | [inline, static] |
Exponentially weighted moving average filter. Transfer function:
y[k] = a*x[k] + (1-a)*y[k-1]
The smoothing factor, "a", is how much weight to assign the latest observation. Values of "a" close to one have less of a smoothing effect and give greater weight to recent changes in the data, while values of "a" closer to zero have a greater smoothing effect and are less responsive to recent changes.[1]
