I used following time series data and tried to get some analysis but failed because of missing values. Could you give some tips? Thank you very much! TG
2.2351
2
2.2450
3
2.2766
4
2.3208
5
2.3390
6
2.3687
7
2.3750
8
2.3859
9
2.3895
10
2.4701
11
2.5120
12
2.5470
13
2.5787
14
2.5874
15
2.6138
16
2.6917
17
2.7008
18
2.7301
19
2.8378
20
2.8435
21
2.8440
22
2.9243
23
2.9422
24
2.9593
25
3.0027
26
3.0340
27
3.0498
28
3.0922
29
3.1719
30
3.1852
31
3.1869
32
3.1925
33
3.2286
34
3.2528
35
3.2542
36
3.3479
37
3.3522
38
3.5066
39
3.5310
nz<-pounds_nz
nz.ts<-ts(nz, st=1991, fr=4)
nz.ar <- ar(nz.ts)
library(forecast)
spec.ar7 = arfimaspec(mean.model=list(armaOrder=c(7,0),include.mean=TRUE))
fit.ar7 = arfimafit(spec=spec.ar7,data=data$spread)
Error in if (mean(data) == 0) { : missing value where TRUE/FALSE needed
fit.ar7
res.ar7 = fit.ar7@fit$residuals
Box.test(res.ar7,lag=4,type="Ljung-Box")
Box.test(res.ar7,lag=8,type="Ljung-Box")
Box.test(res.ar7,lag=12,type="Ljung-Box")