Filter a noisy data.

Hello, I have calculated Vehicle Speed which has steps in it. The steps were removed using the smoothdata() function. Later I used diff(Vehicle_Speed) / diff (time) to calculate acceleration which is very noisy. Using smoothing factor of 0.99 and different methods doesn't show any change but a smoothing factor of 1 gives a straight line. Is there any other way I can get smooth acceleration. As my further calculations are hindered due to acceleration data.

For information, I am working on a longitudinal model of a vehicle to calculate tractive force.

[Mathieu NOE]

can you share your code and data ?

[Star Strider]

For best results (assuming equal-sized vectors), use:

gradient(Vehicle_Speed) ./ gradient(time)

instead.