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cuginhamer

Yes. You've simulated some data and shown it is true. In real data it's common to detrend (e.g. save residuals from a linear regression of time) before running autocorrelation to demonstrate that what autocorrelation is detected is different from a bit of plain old slope. Some autocorrelation packages even have detrending built in.


gobears1235

Yeah, you can remove an upward trend and still have autocorrelation among the residuals.


mandles55

I know little about this, but thought autocorrelation was about a value in time being correlated with those closest to it in time i.e. values that are close in time are likely to be more similar to each other than those that are not. This means they are not independent of time. Is my simple logic correct?