[R] ccf question

John Sibert sibert at hawaii.edu
Fri Sep 10 13:30:04 CEST 2004

Can someone please verify the interpretation of lag in the ccf function in 
the ts package.
Suppose ccf(x,y).
Do negative lags indicate that the events in x precede the events in y and 
positive lags indicate that events in y precede events in x?


John Sibert, Manager
Pelagic Fisheries Research Program
University of Hawaii at Manoa
1000 Pope Road, MSB 313
Honolulu, HI 96822
United States

Phone: (808) 956-4109
Fax: (808) 956-4104

Washington DC
Phone: (202) 861 2363
Fax: (202) 861 4767

PFRP Web Site:   http://www.soest.hawaii.edu/PFRP/
email:  sibert at hawaii.edu

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