[R] Missing Data Line Type?

[Gabor Grothendieck]

On 5/24/05, khobson at fd9ns01.okladot.state.ok.us
<khobson at fd9ns01.okladot.state.ok.us> wrote:
> 
> 
> 
> 
> I have a general question.  Is there a setting that can be used for a
> multiple line type?  The situation is that I want a solid line between x
> and y points but if the y point is missing, I want a dashed line type to
> the next point.  In other words, if point 1 to 2 exists, make that line
> solid, otherwise, make it dashed up to the next existing x/y point.

plot(approx(x), type = "l", lty = 2)
lines(x)

> 
> Additionally, what plot type would you recommend for a plot with two Y
> points per X?  The two points would be joined by a vertical line.  The
> average of the two is the dual type line described above.

See ?segments  .  

Also you might be able to use directly or else scavenge code from
plotCI in package gplots (in the gregmisc bundle) or plotOHLC in
package tseries.