I have a number of signals whose ACF may  or may not cross the zero line.
Whether roots exist or not is a piece of useful information for me.
Likewise, if any root exists, I'd like to know its lag value.
Unluckily R function ACF does not seem to provide such information. 
I wonder whether someone can come up with some suggestions ... maybe there is some other
function that yields the regular ACF plus more ... 
Otherwise, I would appreciate some literature reference or just any advice that can help.
Thank you so much.
Maura



tutti i telefonini TIM!


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