Hi
I have a problem with lm and predict
I have
us
[1] 2789.53 3128.43 3255.03 3536.68 3933.18 4220.25 4462.83 4739.48
[9] 5103.75 5484.35 5803.08 5995.93 6337.75 6657.40 7072.23 7397.65
[17] 7816.83 8304.33 8746.98 9268.43 9816.98 10127.95 10469.60 10960.75
[25] 11685.93 12433.93 13194.70 13843.83
us.p
[1] 227.62 229.92 232.13 234.25 236.31 238.42 240.59 242.75 244.97 247.29
[11] 250.05 253.39 256.78 260.15 263.33 266.46 269.58 272.82 276.02 279.20
[21] 282.31 285.25 288.10 290.85 293.53 296.26 299.08 301.97
us.l = lm(log(us) ~ log(us.p))
> predict(us.l,n.ahead=5)
1 2 3 4 5 6 7 8
8.079754 8.131908 8.181531 8.228692 8.274111 8.320224 8.367224 8.413588
9 10 11 12 13 14 15 16
8.460813 8.509709 8.567285 8.636117 8.705057 8.772694 8.835719 8.897015
17 18 19 20 21 22 23 24
8.957402 9.019376 9.079867 9.139289 9.196752 9.250495 9.302067 9.351347
25 26 27 28
9.398927 9.446950 9.496094 9.545979
Why does predict not give me any predictions? The result of predict() is
same lenght (28) as the us and us.p variables.
best regards
keld
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