R help - May 2012 - access the se of a forecast

Hi everybody,

I am currently trying to forecast some double seasonal time series by using
the function dshw. I want to access the standard errors to build the
confident interval for my forecast. I am using to following code :

fit<-dshw(eem,period1=7,period2=48,h=48)

then by using summary(fit), I see that my se are contained in the vector :
$s20
but when I call fit$s20, I get NULL.

I don't understand why this happens. How should I proceed to get these se?

By advance, thank you very much for your help!

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Hello,

Many people mistake 'summary' for a special kind of print function.
At least I did, at first.
The fact is that 'summary' does it's own computations and outputs
the result
of those computations, to be printed by the appropriate print method.

Simply put, what you need is

summary(fit)$s20

or

sfit <- summary(fit)
sfit$s20

Hope this helps,

Rui Barradas

plocq wrote
> 
> Hi everybody,
> 
> I am currently trying to forecast some double seasonal time series by
> using the function dshw. I want to access the standard errors to build the
> confident interval for my forecast. I am using to following code :
> 
> fit<-dshw(eem,period1=7,period2=48,h=48)
> 
> then by using summary(fit), I see that my se are contained in the vector :
> $s20
> but when I call fit$s20, I get NULL.
> 
> I don't understand why this happens. How should I proceed to get these
se?
> 
> By advance, thank you very much for your help!
> 

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