R help - Apr 2007 - line endings in lattice plots: square vs. round

I would like to use llines() to draw lines with 
square endings in lattice plots.  But the default 
behavior seems to be to draw lines with round 
endings.  How can I change this?

I'm looking for a parameter like par('lend') or 
get.gpar('lineend'), but trellis.par.get() doesn't 
seem to have anything analogous.

I searched the archives but saw nothing on this. 
I'm running R 2.3.1 with lattice 0.13.

Thank you,
--John

See gpar in grid:

library(grid)
?gpar

library(lattice)
xyplot(rivers ~ rivers, type = "l", lwd = 10, lineend = 1)

On 4/1/07, John Bullock <john.bullock at stanford.edu>
wrote:
>
> I would like to use llines() to draw lines with
> square endings in lattice plots.  But the default
> behavior seems to be to draw lines with round
> endings.  How can I change this?
>
> I'm looking for a parameter like par('lend') or
> get.gpar('lineend'), but trellis.par.get() doesn't
> seem to have anything analogous.
>
> I searched the archives but saw nothing on this.
> I'm running R 2.3.1 with lattice 0.13.
>
> Thank you,
> --John
>
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