The Monkey function does not work: AbsoluteCorrelationFunction

Questions
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1

As an ocasssional user of Mathematica, my preferred function is the ‘Monkey’ function. It consists of copying the specific Input from the help documentation and inserting my personal data. I did it with the AbsoluteCorrelationFunction but I failed and I dont know why. I created the following simple cells (Hint, filename.txt contains 130000 numbers)

  • In[1]:= Data = Import[“path\filename.txt”, “Table”]
  • In[2]:=r = AbsoluteCorrelationFunction[data, {1, 10000,1}] (I followed the specification given for hspec)
  • In[3]:=Plot[r, {1, 10000}, AxesOrigin → {0, 0}, PlotRange → All]

But Mathematica answered

  • lot::pllim: "Range specification {1,10000} is not of the form {x, xmin, xmax}.

Where is my ‘x’? Alternatively, I might be interested in exporting the autocorrelation function into an output file: two columns, lag and acf data. How can I do this?
I would greatly appreciate a comment or help

2

Assuming that your data was imported into the correct format for AbsoluteCorrelationFunction, then AbsoluteCorrelationFunction is returning a list of data. So you’d need to use ListPlot. Plot is for functions or an explicit variable, hence the error message. E.g., your Listplot call would be

ListPlot[r, AxesOrigin -> {0, 0}, PlotRange -> All]

without your specific data I cannot be sure this will work, but give it a try.

3

Thanks a lot. It seems working.

Juan