itsmr (version 1.1)

smooth.fft: Apply a low pass filter

Description

Apply a low pass filter

Usage

smooth.fft(x, f)

Arguments

x

Data vector

f

Cut-off frequency, 0-1

Value

• Returns a vector the same length as x.

Details

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

Examples

y = smooth.fft(deaths,.1)
plotc(deaths,y)