B5: Array;
The B5 property returns seasonal component. Outlier values in the series B3 are replaced with corresponding values from B4. You can obtain preliminary seasonal component from this series by taking 5-term moving average for the values corresponding to each month. Then take 12-term moving average for the whole series, and adjust the obtained values for each year for zero sum (additive model) or for the sum 12.0 (multiplicative model).
See also: