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|See also: autocorrelation function, scatter plot|
Autocorrelation can easily be shown when one tries to plot the original value against a time-shifted copy of it. Look, for example, at the population of rabbits. The population shows a regular fluctuation within a period of 10 years.
Plotting the rabbit data against itself with no time shift, of course results in a correlation coefficient of 1.0. A time shift of one year already produces a considerably lower correlation coefficient of 0.63.
You should take a closer look at the relationship between the autocorrelation function and the scatter plots by starting the .
Last Update: 2004-Jul-03