analyze frequency plot of a sound signal fmin,fmax,rate,points scalars. default values fmin=100,fmax=1500,rate=22050,points=8192; Make a frequency plot of the signal w with sampling rate rate. The data must be at least points long. The maximal frequency plotted will be fmax, the minimal fmin. t=soundsec(0.5); s=sin(440*t)+sin(220*t)/2+sin(880*t)/2; [nr,nc]=size(t); s(nc/2:nc)=sin(330*t(nc/2:nc)); analyze(s);