[R] how to find best model of time series?giving error

[sagarnikam123]

yes but giving error
> t<-read.table(file.choose())
> t<-ts(t)
> plot(t)
Hit <Return> to see next plot: 
> ht<-HoltWinters(t)
Error in decompose(ts(x[1L:wind], start = start(x), frequency = f),
seasonal) : 
  time series has no or less than 2 periods

what should i do? 

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