[R] GDD and dashed lines (lty=2)

From: Charles Annis, P.E. <Charles.Annis_at_statisticalengineering.com>
Date: Fri, 14 Mar 2008 10:02:31 -0400

Greetings, R Aficionados:  

I'm running R2.6.2 on a DELL WinXP box with 2 Gig RAM.  

My package GDD renderings of dashed lines aren't dashed. abline() will produce a dashed line, but lines() won't. Here is some illustrative code:  


GDD("dashed line", type="gif", width=480, height=480)

par(mar = c(4.5, 5, 2.5, 1) + 0.1)

plot(x=1:10, y=1:10, pch=16, las=1)

abline(a=0, b=1, lty=2)

lines(x=seq(1,10, length=2), y=1+seq(1,10, length=2), col="red", lty=2)


I experimented with the lines() length parameter thinking that perhaps having too many line segments was the problem, but even with length=2 the lines are not dashed.  

Any suggestions?  

Charles Annis, P.E.  


phone: 561-352-9699

eFax: 614-455-3265


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