Extraction of ridges.
[POINTST,POINTSF]=ridges(TFR,HAT) [POINTST,POINTSF]=ridges(TFR,HAT,T) [POINTST,POINTSF]=ridges(TFR,HAT,T,METHOD) [POINTST,POINTSF]=ridges(TFR,HAT,T,METHOD,TRACE) [POINTST,POINTSF]=ridges(...,'plot')
time-frequency representation
complex matrix of the reassignment vectors.
the time instant(s).
the chosen representation (default: 'tfrrsp').
if nonzero, the progression of the algorithm is shown (default : 0).
when called with the additional string 'plot', the output values will be plotted
ridges xtracts the ridges of a time-frequency distribution. These ridges are some particular sets of curves deduced from the stationary points of their reassignment operators.