Discrete Time Fourier Transform

Compute the Discrete Time Fourier Transform for data stored in a 3-dimensional array.

Usage

dft_3D(a, n.f = dim(a)[3])

Arguments

a

\((m,n,k)\) dimensional (numeric) array

n.f

(integer) number of frequencies

Value

A rationalmatrices::zvalues() object.

Examples

# Basic example
a <- array(1:12, dim = c(2, 2, 3))
result <- dft_3D(a)
result
#> ( 2 x 2 ) frequency response
#>      z[1] [,1]  [,2]    z[2] [,1]         [,2]    z[3] [,1]         [,2]
#> [1,]     15+0i 21+0i -6+3.464102i -6+3.464102i -6-3.464102i -6-3.464102i
#> [2,]     18+0i 24+0i -6+3.464102i -6+3.464102i -6-3.464102i -6-3.464102i