Hi Allstat,
Does anyone know the best way to identify and estimate a trend in a time series? I have found various notes on this that suggest taking a 12 month centered moving average and estimating the trend that way, however the only examples I have seen for this method are for monthly or quarterly data, my data is at daily level. My data exhibits a decaying trend, which is almost exponential, I need to calcuate a daily decay rate based on the decreasing trend. Any help on this would be greatly appreciated.
Best Wishes
Kelly
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