I am dealing with a seasonal time series data. In order to ger rid of the
nonstationarity of the variance, i need to perform power tranformation to
the data and choose the best lambda value. In Mass package, there is a
function called 'boxcox' to do power tranformation but it only deals
with
linear model. Is there anyone who knows the other function that cannot
perform power tranformation to time series data? Thanks!
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