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I am trying to get a psd I type psd = pwelch(x) and I get the error: Undefined function 'pwelch' for input arguments of type 'double'.

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robert koch 2018-2-28

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回答： Walter Roberson 2018-3-1

I am trying to get a psd I type psd = pwelch(x) and I get the error: Undefined function 'pwelch' for input arguments of type 'double'.

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Walter Roberson 2018-3-1

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You do not have the Signal Processing Toolbox installed, or else it is not licensed.

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