R: Holt-Winters with daily data (forecast package)

Question

In the following example, I am trying to use Holt-Winters smoothing on daily data, but I run into a couple of issues:

# generate some dummy daily data
mData          


        

Answer 1

hw requires a ts object not a zoo object. Use

zooDataWeekly <- ts(mData[,2], frequency=7)

Unless there is a good reason for specifying the model exactly, it is usually better to let R select the best model for you:

fit <- ets(zooDataWeekly)
fc <- forecast(fit)
plot(fc)