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itsmr (version 1.9)

smooth.fft: Apply a low pass filter

Description

Apply a low pass filter

Usage

smooth.fft(x, f)

Value

Returns a vector the same length as x.

Arguments

x

Time series data

f

Cut-off frequency, 0-1

Details

The cut-off frequency is specified as a fraction. For example, c=.25 passes the lowest 25% of the spectrum.

Examples

Run this code
y = smooth.fft(deaths,.1)
plotc(deaths,y)

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