?? vtb7_1.m
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function VTB7_1%VTB7_1 is an example of taking a power spectral density% of data. The power spectral density of a signal containing% .5 Hz and 1.59 Hz signals is plotted.t=0:.1:100;t=t';y=sin(pi*t)+sin(10*t);figureaa=version;ll=length(aa);plot(t,y);title('Sin(pi*t)+Sin(10*t) versus Time')xlabel('Time')ylabel('F(t)')x=fft(y,512);grid onpausePyy=x.*conj(x)/512;f=10*(0:255)/512;plot(f,Pyy(1:256))grid ontitle('Power Spectral Density of F(t)')xlabel('Frequency (Hz)')ylabel('Power Spectral Density')pause?? 快捷鍵說明
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