Log Message:
Import harminv-1.3.1 as wip/harminv.

Harminv is a free program to solve the problem of harmonic inversion, given a
discrete-time, finite-length signal that consists of a sum of finitely-many
sinusoids (possibly exponentially decaying) in a given bandwidth, it
determines the frequencies, decay constants, amplitudes,
and phases of those sinusoids.