LowpassFilter

LowpassFilter[data, ωc] applies a lowpass filter with a cutoff frequency ωc to an array of data.

• LowpassFilter[data, ωc, n] uses a filter kernel of length n.
• LowpassFilter[data, ωc, n, wfun] applies a smoothing window wfun to the filter kernel.

Examples

Apply a lowpass filter to noisy data:

data = Table[Sin[x] + RandomReal[{-0.2, 0.2}], {x, 0, 10, 0.1}];
LowpassFilter[data, 0.1]

Use a specific kernel length:

LowpassFilter[data, 0.2, 10]

Please visit the official Wolfram Language Reference for more details.