[R] Missing Data Line Type?

OlsenN@pac.dfo-mpo.gc.ca OlsenN at pac.dfo-mpo.gc.ca
Tue May 24 23:18:48 CEST 2005

The dashed line can be added to the plot with a call to "lines" after
removing the NAs from your x/y vectors (I'm assuming 'missing' means NA).

> plot(x,y,type='l')
> lines(x[!is.na(y)],y[!is.na(y)],lty=2)

Vertical lines can be accomplished with "segments".


-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
khobson at fd9ns01.okladot.state.ok.us
Sent: Tuesday, May 24, 2005 1:39 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Missing Data Line Type?

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.

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.

mailto:khobson at odot.org
Kenneth Ray Hobson, P.E.
Oklahoma DOT - QA & IAS Manager
200 N.E. 21st Street
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(405) 522-4985, (405) 522-0552 fax

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