clear
sim_arma x1, nobs(100) ma(-2)
sim_arma x2, ma(-0.5)
sim_arma x3, ma(-0.8, 0.64)
sim_arma x4, ma(-1.25, 0.64)
pac x1, saving(1,replace)
pac x2, saving(2,replace)
pac x3, saving(3,replace)
pac x4, saving(4,replace)
graph combine 1.gph 2.gph 3.gph 4.gph,ycom
用Mac运行总显示 pac x1, saving(1,replace)
(note: file 1.gph not found)
file 1.gph could not be opened
r(603);求助?


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