# Autocorrelation in Excel

by MichalXC
Tags: autocorrelation, correlation, excel
 P: 41 I have a set of 9,999 equi-spaced data points, and I would like to calculate the autocorrelations for ALL lags up to 5,000. In Excel, I want to have this code: =CORREL(B1:B9998,B2:B9999) =CORREL(B1:B9997,B3:B9999) =CORREL(B1:B9996,B4:B9999) ... =CORREL(B1:B5000,B5000:B9999) Unfortunately, the formula does not "translate" nicely when I extend it downwards. Also I have Excel 2008 for Mac, which does not handle VB Macros. Can anyone direct me? Or suggest a better way of doing it? I don't have MatLab, but I do have Mathematica. Thanks in advance.
 P: 824 Well, I am going to suggest Python, but only because you thought of Matlab, in the first place...which shows that you might be inclined to some scripting. Actually, there is FreeMat which is an a-la-matlab application. But also, there is Python with its numpy and scipy (scipy.stats) modules you can do anything you want and plot it right away with matplotlib. ...just a thought
 HW Helper P: 6,164 Try: =CORREL(OFFSET($B$1, 0, 0, 9999-A1, 1 ),OFFSET($B$1, A1, 0, 9999-A1, 1 )) =CORREL(OFFSET($B$1, 0, 0, 9999-A2, 1 ),OFFSET($B$1, A2, 0, 9999-A2, 1 )) after you have filled column A with the consecutive row numbers (1, 2, 3, ...)
P: 41

## Autocorrelation in Excel

Gsal, sorry, I don't know Python.

The above-posted formula works great though!