Time
ar1
0 200 400 600 800 1000
−4−202
0 5 10 15 20 25 30
0.00.40.8
Lag
ACF
Series ar1
0 5 10 15 20 25 30
0.00.40.8
Lag
Partial ACF
Series ar1
FIG. 17 – Simulation d’unAR1:Xt = 0.8Xt
−1+ǫt, auto-corrélation et auto-corrélation partielle.
Time
ar1
0 200 400 600 800 1000
−40
0 5 10 15 20 25 30
−0.50.00.51.0
Lag
ACF
Series ar1
0 5 10 15 20 25 30
−0.8−0.40.0
Lag
Partial ACF
Series ar1
FIG. 18 – Simulation d’unAR1:Xt=−0.8Xt
−1+ǫt, auto-corrélation et auto-corrélation partielle.
Time
ar2
0 200 400 600 800 1000
−6−224
0 5 10 15 20 25 30
−0.20.20.61.0
Lag
ACF
Series ar2
0 5 10 15 20 25 30
−0.20.20.6
Lag
Partial ACF
Series ar2
FIG. 19 – Simulation d’unAR2:Xt= 0.9Xt
−2+ǫt, auto-corrélation et auto-corrélation partielle.
Time
ar2
0 200 400 600 800 1000
−50
0 5 10 15 20 25 30
−0.50.00.51.0
Lag
ACF
Series ar2
0 5 10 15 20 25 30
−0.8−0.40.0
Lag
Partial ACF
Series ar2
FIG. 20 – Simulation d’unAR2:Xt=−0.5Xt
−1−0.9Xt
−2+ǫt, auto-corrélation et auto-corrélation partielle.
Time
ma1
0 200 400 600 800 1000
−4−202
0 5 10 15 20 25 30
−0.50.00.51.0
Lag
ACF
Series ma1
0 5 10 15 20 25 30
−0.5−0.3−0.1
Lag
Partial ACF
Series ma1
FIG. 21 – Simulation d’unM A1:Xt =ǫt−0.8ǫt
−1, auto-corrélation et auto-corrélation partielle.
Time
ma1
0 200 400 600 800 1000
−4−20
0 5 10 15 20 25 30
0.00.40.8
Lag
ACF
Series ma1
0 5 10 15 20 25 30
−0.20.20.4
Lag
Partial ACF
Series ma1
FIG. 22 – Simulation d’unM A1:Xt =ǫt+ 0.8ǫt
−1, auto-corrélation et auto-corrélation partielle.
Time
ma3
0 200 400 600 800 1000
−1005
0 5 10 15 20 25 30
0.00.40.8
Lag
ACF
Series ma3
0 5 10 15 20 25 30
−0.20.20.4
Lag
Partial ACF
Series ma3
FIG. 23 – Simulation d’unM A3, auto-corrélation et auto-corrélation partielle.