Documentation

Periodogram PSD Object to Function Replacement Syntax

The spectrum.periodogram object syntax will be removed in the future. The following table gives the equivalent recommended function syntax for periodogram. In the modified periodogram, you use a window other than the default rectangular window. To illustrate modified periodogram syntaxes, the table uses a specific window. In each example, x is the input signal.

Deprecated Syntax

Replacement Syntax

h = spectrum.periodogram;
psd(h,x);
periodogram(x);
Modified periodogram with window function:
h = spectrum.periodogram('hamming');
psd(h,x);
win = hamming(length(x));
periodogram(x,win);
Window function and optional input arguments to window function:
h = spectrum.periodogram({'Hamming','periodic'});
psd(h,x);
win = hamming(length(x),'periodic');
periodogram(x,win);
Taylor window and multiple optional input arguments:
nbar = 4;
sll = 30;
h = spectrum.periodogram({'Taylor',nbar,sll});
psd(h,x,'Fs',fs,'centerdc',true);
nbar = 4;
sll = -30;
win = taylorwin(length(x),nbar,sll);
periodogram(x,win,[],fs,'centered');
h = spectrum.periodogram(...);
psd(h,x,'NFFT',nfft);
win = ...
periodogram(x,win,nfft);
h = spectrum.periodogram(...);
psd(h,x,'Fs',fs);
win = ...
periodogram(x,win,[],fs);
h = spectrum.periodogram(...);
psd(h,x,'NFFT',nfft,'Fs',fs);
win = ...
periodogram(x,win,nfft,fs);
h = spectrum.periodogram(...);
psd(h,x,...,'FreqPoints','User Defined',...
'FrequencyVector',w);
win = ...
periodogram(x,win,w);
h = spectrum.periodogram(...);
psd(h,x,'FreqPoints','User Defined',...
'FrequencyVector',f,'Fs',fs);
win = ...
periodogram(x,win,f,fs);
Two-sided spectrum of a real signal:
h = spectrum.periodogram(...);
psd(h,x,...,'SpectrumType','TwoSided');
win = ...
periodogram(x,win,...,'twosided');
Two-sided spectrum with DC (0 frequency) in the center:
h = spectrum.periodogram(...);
psd(h,x,...,'CenterDC',true);
win = ...
periodogram(x,win,...,'centered'); 
h = spectrum.periodogram(...);
psd(h,x,...,'ConfLevel',p);
win = ...
periodogram(x,win,...,'ConfidenceLevel',p);
h = spectrum.periodogram(...);
hPSD = psd(h,x,...);
Pxx = hPSD.Data;
F = hPSD.Frequencies;
win = ... 
[Pxx,F] = periodogram(x,win,...); 
h = spectrum.periodogram(...);
hPSD = psd(h,x,...,'ConfLevel',p);
Pxx = hPSD.Data;
F = hPSD.Frequencies;
Pxxc = hPSD.ConfInterval;
win = ... 
[Pxx,F,Pxxc] = periodogram(x,win,...); 

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