Re: [R] cpgram: confidence band with a chirp signal

I answer to myself: I have to generate my signal up to f1 = Fs/2 in order to have a flat response over the entire frequency range. Le 09/04/2024 à 19:48, laurentRhelp a écrit : Dear RHelp-list,    I generate a swept sine signal using the signal library. I can see using the spec.pgram command

[R] cpgram: confidence band with a chirp signal

Dear RHelp-list,    I generate a swept sine signal using the signal library. I can see using the spec.pgram command that the spectrum of this signal is white. But when I am calculating the cumulative periodogram using the command cpgram the process doesn't stay inside the confidence band (cf.