y = interpft(x,n)
y = interpft(x,n) returns the vector y that contains the value of the periodic function x resampled to n equally spaced points. If length(x) = m, and x has sample interval dx, then the new sample interval for y is
dy = dx*n/m
Note that n cannot be smaller than m.
interpft uses the FFT method. The original vector x is transformed to the Fourier domain using fft and then transformed back with more points.
interp1,interp2
(c) Copyright 1994 by The MathWorks, Inc.