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October 18th, 2018, 08:09 AM   #1
Newbie

Joined: Apr 2016
From: Wonderland

Posts: 23
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Correlogram

What is the significance of a correlogram? I am confused over the terms cross-correlation and correlogram. They are the same thing, right?

Let's say there is a plot of correlogram as attached.

What can we comment about it? The x axis is the time whereas the y axis is the correlation between 2 variables, say temperature and rainfall. How does the correlogram give information between the 2 variables?

I notice a sinusoidal pattern in the plot.

Any input/discussion is appreciated!
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 October 18th, 2018, 01:26 PM #2 Global Moderator   Joined: May 2007 Posts: 6,807 Thanks: 717 https://en.wikipedia.org/wiki/Correlogram correlogram is the plot of the data
 October 18th, 2018, 04:48 PM #3 Newbie   Joined: Apr 2016 From: Wonderland Posts: 23 Thanks: 0 Thank you for the input. What is the significance of the shape of the correlogram though? Comparing that of what I have posted (which is not autocorrelation) versus the wiki link, which is the autocorrelation, there seems to be a difference in pattern...

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