[R] adding line to spinogram

[Viktor Tron]

Hello,
Thanks for the hint.
grid.segments seemed the closest I got.
I did manage to draw (well fake) a line with it. I can only address the
whole drawing frame, which means I can only adjust the position and length  
of the line
by trial and error. I see no way to address the y axis scale of my  
spinogram/histogram.
Is there a way?
Not a huge problem, but I thought someone must have thought of adding  
lines to
their spinograms or histograms before...
V


On Mon, 15 May 2006 14:13:00 +0100, Prof Brian Ripley  
<ripley at stats.ox.ac.uk> wrote:

> Package vcd is built on grid, not base graphics.
>
> On Mon, 15 May 2006, Viktor Tron wrote:
>
>> Dear all,
>> I wonder what's special about spinograms {vcd} that prevents me from  
>> using
>> it the way I do with other plots.
>>
>> I do:
>>
>>> spine(f.speaker.identity ~ x.log.lengthening,
>>> data=ms,breaks=45,gp=gpar(fill=c("red","green")),xlab="length  
>>> difference
>>> (log ms)",ylab="speaker")
>>> curve(0*x,add=T)
>> Error in plot.xy(xy.coords(x, y), type = type, col = col, lty = lty,  
>> ...) :
>> 	plot.new has not been called yet
>>
>>
>> OK, if I do
>>> curve(0*x,add=)
>>> spine(f.speaker.identity ~ x.log.lengthening,
>>> data=ms,breaks=45,gp=gpar(fill=c("red","green")),xlab="length  
>>> difference
>>> (log ms)",ylab="speaker")
>>> curve(0*x,add=T)
>>
>> then the plot is what I want, but note that I had to use y=0 to get the
>> line put at 0.5!!!! so it is already suspicious.
>> But then:
>>
>>> dev.print(pdf,"mde_speakerration_by_lengthening.pdf")
>> Error in dev.copy(device = function (file = ifelse(onefile,  
>> "Rplots.pdf",
>> :
>> 	invalid graphics state
>>
>> Can anyone suggest a remedy?
>
> Use grid primitives to add to the plot.
>