[R] how to connect dots by passing NA

[Gabor Grothendieck]

Also, here is a similar solution, even more compact,
not involving zoo:

plot(y ~ x, na.omit(data.frame(x, y)), lty = 3, type = "l")
lines(y ~ x)

On Wed, Apr 16, 2008 at 11:18 PM, Gabor Grothendieck
<ggrothendieck at gmail.com> wrote:
> Try this which interpolates the NAs using na.approx from zoo
> drawing the interpolated series with lty=3 and then overwrites
> solid lines with the gaps using lines.
>
> library(zoo)
> plot(y ~ x, as.data.frame(na.approx(zoo(cbind(x, y)))), lty = 3, type = "l")
> lines(y ~ x)
>
>
>
> On Wed, Apr 16, 2008 at 8:56 PM, DinoDragon <timd_huang at yahoo.com> wrote:
> > This maybe a silly question. I'm trying to figure out a way to draw a line from a data set which contain NA. Say, I have a set of data as:
> >
> > x <- c(1.1 2.2 NA 4.4 5.5)  ; y <- c(1:5) # as x,y of point a, b, c, d, and e.
> >
> > I would like to plot this to a line by using dot-line to connect the two
> > adjacent points before and after the NA, something like: (a)______(b)......(d)______(e)
> >
> > Any help will be very appreciated.
> >
> > --
> >
> >
> > Smiles,
> >
> > Timothy Huang 黃大ㄧ
> >
> > 43, Lane 525, Section 3, AnKang Road, XinDian City
> >
> > Taipei County, Taiwan 23156, Rep. of China
> >
> > 台北縣23156新店市安康路三段525巷43號
> >
> > Tel 886-2-2214-0517 Fax 886-2-2214-4201
> >
> >
> > Get Skype <http://www.skype.com/go/download> and call me for free.
> >
> > Web: www.dinodragon.com <http://www.dinodragon.com/>
> >
> > Blog: http://tw.myblog.yahoo.com/timd_huang/
> >
> > Blog: http://bloguide.ettoday.com/dinodragon/
> > Web: http://www.meteoritefossilgallery.com/
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > 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.
> >
>