w=pulsewidth(x) w=pulsewidth(x, Fs) w=pulsewidth(x, t) w=pulsewidth (x, t, 'Polarity', pol) w=pulsewidth(x, t, 'MidPercentReferenceLevel', N ) w=pulsewidth(x, t, 'Tolerance', M) w=pulsewidth(x, t,'StateLevels', O)