Data - Single Exponential Smoothing
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Your time series must be in a numeric column.

The time series cannot  include any missing values. If you have missing values, you may want to provide estimates of the missing values. If you

·    Have seasonal data, estimate the missing values as the fitted values from the decomposition procedure. Replace the missing values in the series with the corresponding fitted values computed by Decomposition.

·    Do not have seasonal data, estimate the missing values as the fitted values from the moving average procedure. Replace the missing value with the fitted value computed by Moving Average.