Message-ID: <41A0B9C1.5090801@vanderbilt.edu>
Date: 2004-11-21T15:52:33Z
From: Frank E Harrell Jr
Subject: Error with strwidth after lattice graphic drawn
In-Reply-To: <419F8AB3.9050203@statistik.uni-dortmund.de>
Uwe Ligges wrote:
> Prof Brian Ripley wrote:
>
>> On Sat, 20 Nov 2004, Frank E Harrell Jr wrote:
>>
>>> In
>>>
>>> platform i386-pc-linux-gnu
>>> arch i386
>>> os linux-gnu
>>> system i386, linux-gnu
>>> status
>>> major 2
>>> minor 0.1
>>> year 2004
>>> month 11
>>> day 15
>>> language R
>>>
>>> I'm getting an error when using strwidth after a lattice graphic is
>>> drawn:
>>>
>>> library(lattice)
>>> xyplot(runif(20) ~ runif(20))
>>> strwidth('xxx')
>>>
>>> Error in strwidth("xxx") : invalid graphics state
>>>
>>> Any help appreciated. I have version 2.0.1 of grid and version
>>> 0.10-14 of lattice.
>>
>>
>>
>> The advice is `don't do that'!
>>
>> strwidth() is a base graphics command, and will only work if a device
>> is currently plotting base graphics. Lattice is built on grid, which has
>> stringWidth().
>>
>
> ... and convertWidth() is useful to display stuff afterwards in an
> interpretable way ...
>
> Uwe Ligges
>
Thanks Uwe and Brian. Before the latest versions, grid would let me use
ordinary graphics functions to deal with the currently rendered plot
after I did par(usr=c(0,1,0,1)), so I was lazy. I changed my code to
use specific grid functions.
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University