INVRft {RSEIS}R Documentation

Inverse Fourier Transform

Description

Inverse Fourier Transform

Usage

INVRft(G, n, tstart, dt)

Arguments

G Input fourier transform
n length of time vector
tstart time series starts at tstart
dt Delta t, sample rate

Details

G is a vector spectrum evaluated at positive and negative frequencies as defined by makefreq. tstart, dt and n define the output time vector as described above.

g is the Inverse Fourier Transform of G scaled by dt. time shift theorem has been used to account for time not starting at t=0.

Value

g truncate time vector to N points
f frequencies
t times

Author(s)

Jonathan M. Lees<jonathan.lees.edu>

See Also

makefreq, FRWDft, INSTresponse

Examples

zil = rnorm(300)
fss = FRWDft( zil, length(zil), 0, 0.004)   
INVRft(fss$G, length(zil), 0, 0.004)


[Package RSEIS version 2.1-4 Index]