[R] slanted ends of horizontal lines for certain line widths

[Robert Offinger]

Thanks a lot!

That was exactly what I was looking for.
By the way, I see that since R version 2.3.0 that can be specified
inline, i.e.,

plot(c(1,2), c(1,1), xlim=c(0,3), lwd=10, type="l", lend=2)

So no need for par()...

Dimitrios Rizopoulos wrote:
> probably you want to look at the `lend' argument of ?par, e.g.,
> 
> op <- par(lend = 2)
> plot(c(1,2), c(1,1), xlim = c(0,3), lwd = 20, type = "l")
> par(op)
> 
> I hope it helps.
> 
> Best,
> Dimitris
> 
> ---- 
> Dimitris Rizopoulos
> Ph.D. Student
> Biostatistical Centre
> School of Public Health
> Catholic University of Leuven
> 
> Address: Kapucijnenvoer 35, Leuven, Belgium
> Tel: +32/(0)16/336899
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> Web: http://med.kuleuven.be/biostat/
>      http://www.student.kuleuven.be/~m0390867/dimitris.htm
> 
> 
> Quoting Robert Offinger <rooff at merkur.math.uni-magdeburg.de>:
> 
>> Hello,
>>
>> if I plot a horizontal line, e.g.,
>>
>>   plot(c(1,2),c(1,1),xlim=c(0,3),lwd=2,type="l")
>>
>> or
>>
>>   plot(c(1,2),c(1,1),xlim=c(0,3),lwd=4,type="l")
>>
>> then the left end (1st example) or both ends (2nd example) of the
>> lines
>> are not rectangular but slanted on the graphical display (screen).
>> That behavour first occurred when I was trying to plot a stepfun,
>> e.g.,
>>
>> y <- round(rnorm(12),1)
>> Fn12 <- ecdf(y)
>> plot(Fn12,verticals= FALSE, do.p = FALSE,lwd=2,col.h="red")
>> plot(Fn12,verticals= FALSE, do.p = FALSE,lwd=4,col.h="red")
>>
>> (lwd=3 seems okay)
>>
>> Bug or feature?
>> Suggestions? (I don't like the slanted ends but lwd=2 would be
>> better
>> than lwd=3)
>>
>> Robert Offinger
>> OvG-Universität Magdeburg
>>
>> ----
>> platform       sparc-sun-solaris2.9
>> arch           sparc
>> os             solaris2.9
>> system         sparc, solaris2.9
>> status
>> major          2
>> minor          3.1
>> year           2006
>> month          06
>> day            01
>> svn rev        38247
>> language       R
>> version.string Version 2.3.1 (2006-06-01)
>>
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>>
> 
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