filename what "~/sasuser.v94/private/hw2p2_discussion_data.txt"; data look; infile what; time=_n_; input z1 z2 z3 z4; run; title "Series z2 -- first third"; proc arima data=look(firstobs=1 obs=133); identify var=z2; run; title "Series z2 -- last third"; proc arima data=look(firstobs=267 obs=400); identify var=z2; run; title "Series z1 -- first half"; proc arima data=look(firstobs=1 obs=200); identify var=z1; run; title "Series z1 -- second half"; proc arima data=look(firstobs=201 obs=400); identify var=z1; run; title "Series z1 -- histogram of first half"; proc sgplot data=look(firstobs=1 obs=200); histogram z1 ; run ; title "Series z1 -- histogram of second half"; proc sgplot data=look(firstobs=201 obs=400); histogram z1 ; run ;