frequency response to phase and magnitude representation
[db, phi] = dbphi(repf)
vector of gains (db) and phases (degrees)
vector of complex frequency response
db(k)
is the magnitude of repf(k)
expressed in dB i.e.
db(k)=20*log(abs(repf(k)))/log(10)
and phi(k)
is the phase
of repf(k)
expressed in degrees.