Try the Default number of
lags first. The default number of lags range from (
+ 10) to (
+ 10). Then, you can increase or decrease the number of lags after you examine the plot:
In Number of lags, enter the number (k) of past values that you want to cross correlate between two time series. Minitab calculates the cross correlations for a lag of 1 through a lag of k.
- Increase the number if the default misses a longer term pattern. However, usually you only look for short term lags. Effects between time series usually do not take a long time if the series are related to each other.
- Decrease the number to reduce the clutter in the plot.
| K = 0 | K = -1 | K = 1 | |||||
|---|---|---|---|---|---|---|---|
| Time 1 | Time 2 | Time 1 | Time 2 | Time 1 | Time 2 | ||
| 2 | 1 | 2 | * | * | 1 | ||
| 4 | 3 | 4 | 1 | 2 | 3 | ||
| 6 | 5 | 6 | 3 | 4 | 5 | ||
| 5 | 6 | ||||||
