Double Exponential Smoothing
This calculator provides a description and an example of the double exponential smoothing.
Simple exponential smoothing does not give 100% results. To get a clearer data using double exponential smoothing.
double-smoothing formula is based on the previous formula (simple smoothing), only now add another member, that changes the input the previous value (depending on the trend).
where - it is a simple value [0; 1)
where - [0, 1]
There are no one way to select the initial parameters, namely, S and b, data that affect the final result.
The methods that are used:
b can still be calculated as follows:
to predict the next value has a formula:
to predict several meanings:
This calculator can be changed and, as well as to compare the results with a simple smoothing.
The graph also shows the projected value of the following (smoothed average extended for 1 readout on the evidence).