1、创建1到10的时间数列，结果如下：
> ts(1:10,start=1923)
Time Series:
Start = 1923
End = 1932
Frequency = 1
[1] 1 2 3 4 5 6 7 8 9 10
2、建立年数据时间数列：
> ts(1:45,frequency=12,start=c(1923,3))
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1923 1 2 3 4 5 6 7 8 9 10
1924 11 12 13 14 15 16 17 18 19 20 21 22
1925 23 24 25 26 27 28 29 30 31 32 33 34
1926 35 36 37 38 39 40 41 42 43 44 45
