[R] how to connect dots by passing NA
Gabor Grothendieck
ggrothendieck at gmail.com
Thu Apr 17 13:34:31 CEST 2008
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
> >
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> >
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> >
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> >
> >
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> >
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> >
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