求救!!!!!!!时间序列写入出错

求救!!!!!!!时间序列写入出错
XLS是中联重科的收市价，已改做CSV (附件不容上CSV)，想做HoltWinters，已跟下图做，为何总是出错??
1157.xls (17 KB)

2012-12-7 18:34:41 上传

you have only 22 data points?
is it  even possible  to find its seasonal component?

Some one must have told you 50+ points are needed sometimes, anyone agree with me ?

showbox33 发表于 2012-12-7 22:57
Some one must have told you 50+ points are needed sometimes, anyone agree with me ?

50POINT??

Error in decompose(ts(x[1L:wind], start = start(x), frequency = f), seasonal) :
  time series has no or less than 2 periods


what's problem?