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Calculate autocorrelation excel8/22/2023 This is the autocorrelation at lag k = 3. We can calculate the autocorrelation at lag k = 3 by changing the range of values in the formula: =(SUMPRODUCT( B2:B13-AVERAGE( B2:B16), B5:B16-AVERAGE( B2:B16))/COUNT( B2:B16))/VAR.P( B2:B16) This is the autocorrelation at lag k = 2. We can use the following formula to calculate the autocorrelation at lag k =2. There is no built-in function to calculate autocorrelation in Excel, but we can use a single formula to calculate the autocorrelation for a time series for a given lag value.įor example, suppose we have the following time series that shows the value of a certain variable during 15 different time periods: When the autocorrelation in a time series is high, it becomes easy to predict future values by simply referring to past values. It’s also sometimes referred to as “serial correlation” or “lagged correlation” since it measures the relationship between a variable’s current values and its historical values. Autocorrelation measures the degree of similarity between a time series and a lagged version of itself over successive time intervals.
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