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October 18th, 2018, 09:09 AM  #1 
Newbie Joined: Apr 2016 From: Wonderland Posts: 18 Thanks: 0  Correlogram
What is the significance of a correlogram? I am confused over the terms crosscorrelation 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! 
October 18th, 2018, 02:26 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,660 Thanks: 648  
October 18th, 2018, 05:48 PM  #3 
Newbie Joined: Apr 2016 From: Wonderland Posts: 18 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...
