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2017 Oct 02
2
Default value of the option initial in the ses function in the forecast package.
...value will its default
value be "optimal".
A MWE would be :
library(fpp)
oildata <- window(oil,start=1996,end=2007)
fit3 <- ses(oildata, h=3)
In the above is the default value of initial "optimal" or "simple" ?
Note I have taken this example from https://www.otexts.org/fpp/7/1
Best Regards,
Ashim
[[alternative HTML version deleted]]
2023 Aug 12
1
time series transformation....
dear members,
I have a heteroscedastic time series which I want to transform to make it homoscedastic by a box cox transformation. I am using Otexts by RJ hyndman and George Athanopolous as my textbook. They discuss transformation and also say the fpp3 and the fable package automatically back transforms the point forecast. they also discuss the process which I find to be very cumbersome. Is there any R package which automatically back transfor...
2017 Aug 11
2
Directional Forecast
I've some demand data, for which I wish to judge what will be the direction
in the forecast period (Up/Down). What will be a best ML method to do this?
Currently I'm using the data given below -
9/4/2016 241
9/11/2016 233
9/18/2016 226
9/25/2016 282
10/2/2016 291
10/9/2016 282
10/16/2016 308
10/23/2016 291
10/30/2016 268
11/6/2016 262
11/13/2016 273
11/20/2016 262
11/27/2016 309
12/4/2016
2017 Aug 11
0
Directional Forecast
I suggest, you read:
Forecasting: principles and practice from Hyndman-Athana?sopou?los
https://www.otexts.org/fpp
2017 Oct 02
0
Default value of the option initial in the ses function in the forecast package.
...;.
>
> A MWE would be :
>
> library(fpp)
> oildata <- window(oil,start=1996,end=2007)
> fit3 <- ses(oildata, h=3)
>
> In the above is the default value of initial "optimal" or "simple" ?
>
> Note I have taken this example from https://www.otexts.org/fpp/7/1
>
> Best Regards,
> Ashim
>
> [[alternative HTML version deleted]]
>
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> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read...
2016 Apr 07
4
Contenido de un objeto/modelo ARIMA
Buenos días,
Os cuento:
Cargo la librería "Forecast" y ejecuto su función Arima(...) sobre una
serie temporal:
mimodelo <- Arima(miST$miserie, ...);
Ahora si ejecuto las siguientes sentencias, voy obteniendo los resultados
contenidos en "mimodelo", pero algunos de ellos no sé lo que son:
mimodelo[[1]] obtengo los coeficientes del modelo ARIMA
mimodelo[[2]] obtengo el