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anindya55

2012-Jun-08 14:49 UTC

[R] Holt Winters in R - Help needed

Hi,

I have the following data in a csv file
49893878, 54350306, 68914033, 46888379, 75506404, 
54164263, 62846960, 78304638, 63721932, 70269568, 60440103, 79784327, 
65918962, 76581629, 72016677, 47225594, 93944513, 65793666, 82709931, 
87852261, 75876270, 88715213, 65496028, 80160380, 66089429, 106857813, 
76237641, 59301581, 78705651, 66108909, 77685572, 74416530, 72618166, 
82060938, 65326366, 71710371, 70695772

I tried to do HoltWinters with seasonality with this data but keep getting
error.

First I used the following code:

time_data1<-as.ts(time_data)
HoltWinters(time_data1,gamma=TRUE)

But it  gave the following error - "Error in decompose(ts(x[1L:wind], start
= start(x), frequency = f), seasonal) : 
  time series has no or less than 2 periods"

Then I tried the following code and got the same error:-

time_data1<-as.ts(cbind(time_data,c(1:length(time_data))))
HoltWinters(time_data1,gamma=TRUE)

After that I tried the following code and got the same error:-


time_data1<-as.ts(cbind(c(1:length(time_data)),time_data))
HoltWinters(time_data1,gamma=TRUE)


I understand that there is some concept called frequency which is creating
the problem, but can anyone help me on this please? I really need it urgent.
All my values corresponds to one single time point.

--
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Sent from the R help mailing list archive at Nabble.com.

R. Michael Weylandt

2012-Jun-08 16:02 UTC

head link

[R] Holt Winters in R - Help needed

You need to set the frequency attribute of your time series.

E.g.,

HoltWinters(ts(sample(100)))

HoltWinters(ts(sample(100), frequency = 4)) # Quarterly data

See ?ts for what frequency is and to figure out what makes sense for
your problem.

Best,
Michael

On Fri, Jun 8, 2012 at 9:49 AM, anindya55 <anindya55 at gmail.com>
wrote:> Hi,
>
> I have the following data in a csv file
> 49893878, 54350306, 68914033, 46888379, 75506404,
> 54164263, 62846960, 78304638, 63721932, 70269568, 60440103, 79784327,
> 65918962, 76581629, 72016677, 47225594, 93944513, 65793666, 82709931,
> 87852261, 75876270, 88715213, 65496028, 80160380, 66089429, 106857813,
> 76237641, 59301581, 78705651, 66108909, 77685572, 74416530, 72618166,
> 82060938, 65326366, 71710371, 70695772
>
> I tried to do HoltWinters with seasonality with this data but keep getting
> error.
>
> First I used the following code:
>
> time_data1<-as.ts(time_data)
> HoltWinters(time_data1,gamma=TRUE)
>
> But it ?gave the following error - "Error in decompose(ts(x[1L:wind],
start
> = start(x), frequency = f), seasonal) :
> ?time series has no or less than 2 periods"
>
> Then I tried the following code and got the same error:-
>
> time_data1<-as.ts(cbind(time_data,c(1:length(time_data))))
> HoltWinters(time_data1,gamma=TRUE)
>
> After that I tried the following code and got the same error:-
>
>
> time_data1<-as.ts(cbind(c(1:length(time_data)),time_data))
> HoltWinters(time_data1,gamma=TRUE)
>
>
> I understand that there is some concept called frequency which is creating
> the problem, but can anyone help me on this please? I really need it
urgent.
> All my values corresponds to one single time point.
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Holt-Winters-in-R-Help-needed-tp4632816.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

R help - Jun 2012 - Holt Winters in R - Help needed

[R] Holt Winters in R - Help needed

[R] Holt Winters in R - Help needed