Interpolate FRD model
isys = interp(sys,freqs)
isys = interp(sys,freqs) interpolates the
frequency response data contained in the FRD model
which is an overloaded version of the MATLAB® function
uses linear interpolation and returns an FRD model
the interpolated data at the new frequencies
sys is an IDFRD model,
the noise spectrum, if non-empty, is also interpolated. The response
and noise covariance data, if available, are also interpolated.
You should express the frequency values
the same units as
sys.frequency. The frequency
values must lie between the smallest and largest frequency points
sys (extrapolation is not supported).