Compute power spectrum mode indicator function.
mif=psmif(f)
mif=psmif(f,ct)
PSMIF will compute the power spectral mode indicator function from the frequency response functions in the supplied imat_fnF. The power spectral mode indicator function is simply the summation of the FRF multiplied by its conjugate. One mode indicator function will be computed for each reference in F. If there is more than one reference, a PSMIF will also be computed that contains all of the FRF for all references.
CT is an optional imat_ctrace containing response DOF to use in the calculation. They must all be present for each reference, otherwise an error will occur.
MIF is an imat_fn output that will have the same attributes as the input F, except that the functions will be a Mode Indicator Function and the ordinate data types are unknown. The reference coordinates will be set to the reference coordinate used to calculate the MIF, and the response coordinate is set to '1PMIF'.
>> mif=psmif(f)