fftnneg: Non-negative frequencies of FFT

In jrevenaugh/TSAUMN: Time Series Analysis Tools Used in ESCI5201 at the University of Minnesota

Description

Compute non-negative frequency coefficients of fft

Usage

fftnneg(s)

Arguments

s	vector of time series samples

Value

complex valued fft of s at non-negative frequencies, ordered DC to Nyquist

Examples

s <- sin( 2 * pi * ( 1:256 ) * 0.1 )
S <- fftnneg( s )
f <- seq( 0, to = 0.5, length.out = length( S ) )
plot( f, Mod( S ), type = "l", xlab = "Frequency", ylab = "Mod(S)" )

jrevenaugh/TSAUMN documentation built on Nov. 8, 2019, 2:20 p.m.