例:data a;
input x@@;
cards;
15 36 56 16 34 36 25 52 68 98 102 104
112 132 145 165 148 365 123 66 54 12
12 32 65 32 15 42 15 65 98 24 56 23
run;
proc arima;
identify var=x nlag=18 outcov=out1;
run;
proc gplot data=out1;
plot corr*lag partcorr*lag /vaxis=-1 to 1 by 0.1;
symbol c=black i=needle v=none;
run;
僅供參考。