Hello! Happy Thanksgiving to those who are celebrating. I have a zoo series that I am plotting, and I would like to have some vertical lines at certain points, to indicate US business cycles. Here is an example:
app1 <- get.hist.quote(instrument="appl", start="1985-01-01",end="2016-08-31", quote="AdjClose", compression="m") #Fine plot(app1,main="Historical Stock Prices: Apple Corporation") #Still Fine #Now I want to use abline at July 1990 and March 1991 (as a start) for business cycles. I tried v=67 and v="1990-07", no good. I have a feeling that it's really simple and I'm just not seeing it. Any help much appreciated. Thanks, Erin -- Erin Hodgess Associate Professor Department of Mathematical and Statistics University of Houston - Downtown mailto: erinm.hodg...@gmail.com [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.