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PacfToAR(zeta)
InvertibleQ
PacfToAR
somePACF<-c(0.5,0.6,0.7,0.8,-0.9,-0.8) someAR<-PacfToAR(somePACF) test<-ARToPacf(someAR) #this should be very small sum(abs(test-somePACF))
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