Nice! That's perfect! Thanks very much!
Sincerely, Erin On Thu, Nov 24, 2016 at 11:27 PM, Gabor Grothendieck < ggrothendi...@gmail.com> wrote: > Recessions are typically shown by shading. The zoo package has > xblocks for this purpose. If app1 is your zoo object then: > > plot(app1) > tt <- time(app1) > xblocks(tt, tt >= "1990-07-01" & tt <= "1991-03-31", > col = rgb(0.7, 0.7, 0.7, 0.5)) # transparent grey > > See ?xblocks for more info. > > > > On Thu, Nov 24, 2016 at 10:03 PM, Erin Hodgess <erinm.hodg...@gmail.com> > wrote: > > 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. > > > > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com > -- 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.