[R] RES: time series interpolation
David Winsemius
dwinsemius at comcast.net
Wed Jun 29 21:11:06 CEST 2011
On Jun 29, 2011, at 2:37 PM, Filipe Leme Botelho wrote:
> Hi Tom,
>
> At least to me it´s hard to picture what´s wrong without further
> details regarding your data. I use spline/linear interpolation of
> time series regularly, so maybe this example help you out.
>
>> ci_x
> [1] 1 4 69 131 194 256 320 382
>> ci_y
> [1] 0.1211 0.1213 0.1233 0.1241 0.1250 0.1254 0.1255 0.1255
>>
>> approx(x=ci_x, y=ci_y, n=ci_x[length(ci_x)])$y
>
>
> Regards,
> Filipe.
>
> -----Mensagem original-----
> De: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] Em nome de tomtomme
> Enviada em: quarta-feira, 29 de junho de 2011 12:28
> Para: r-help at r-project.org
> Assunto: [R] time series interpolation
>
> Hi there,
> I´ve got a datatable in R which I try to interpolate with this and
> get the
> Error below:
>
>> new$temp<- approx(w03_11temp$temp, n = (nrow(w03_11temp)*5))$y
It looks to me that you are trying to assign a column vector into a
dataframe but you are constructing it with five times as many elements
as the dataframe has rows. I am unable to explain the error message,
however. You say this is a 'datatable', so maybe the datatable
maintainers would have a better idea, assuming you are using your
terms correctly.
>
> Error in new$temp <- approx(w03_11temp$temp, n = (nrow(w03_11temp) *
> 5))$y :
> Object of type 'closure' not registered
>
> Any idea?? Thanks a lot.
>
> --
> View this message in context: http://r.789695.n4.nabble.com/time-series-interpolation-tp3633193p3633193.html
> Sent from the R help mailing list archive at Nabble.com.
>
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David Winsemius, MD
West Hartford, CT
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