Function\code{acfpacf}returnsplotofACFandPACFvalueswithtwotypesof thresholdsforinput\code{acalpha}and\code{pacalpha},respectively.Thefirstone denotedby\code{thr}isgivenforACFvaluesby\eqn{Pr[acf(j)>thr]=\alpha/2}and\eqn{Pr[acf(j)<-thr]=\alpha/2} ...