[R] abline with zoo series

[Erin Hodgess]

Nice!  That's perfect!

Thanks very much!

Sincerely,
Erin

On Thu, Nov 24, 2016 at 11:27 PM, Gabor Grothendieck <
ggrothendieck at 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.hodgess at 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.hodgess at gmail.com
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at 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.hodgess at gmail.com

	[[alternative HTML version deleted]]