[R] abline with zoo series
erinm.hodgess at gmail.com
Fri Nov 25 05:37:52 CET 2016
On Thu, Nov 24, 2016 at 10:14 PM, David Winsemius <dwinsemius at comcast.net>
> > On Nov 24, 2016, at 7:03 PM, Erin Hodgess <erinm.hodgess at gmail.com>
> > 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
> > an example:
> > app1 <- get.hist.quote(instrument="aapl", # note correction
> > 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.
> #Try this:
> abline( v= as.Date("1990-07-01") )
> The x-axis is being created using the Date class values and formatting.
> > 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]]
> > ______________________________________________
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> > and provide commented, minimal, self-contained, reproducible code.
> David Winsemius
> Alameda, CA, USA
Department of Mathematical and Statistics
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com
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