Hi,

 When I plot the auto co-relation function (acf), 2 blue lines appear near the base. Can anyone tell me what they mean?

Also can anyone tell me how to print the graphs that are generated. There is a print option but when I click on it, it doesn't seem to do anything. Is copying the graph as a bitmap file in paint the only way out? 

 Thanks for any help.

Regards,

 Shalini

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