[R] errorbars with xyplot

[Frank E Harrell Jr]

Ronny Hannemann wrote:
> Hi everyone,
> 
> I'm very new to R and I like to learn a lot... actually I have a little
> problem concerning errorbars with xyplot.
> 
> My data look like
>   run target   hemi             x
> 1   1 Nichts  Links  0.0007743240
> 2   2 Nichts  Links -0.0008153365
> 3   1 Target  Links -0.0015825950
> 4   2 Target  Links  0.0088743785
> 5   1 Nichts Rechts  0.0015898995
> 6   2 Nichts Rechts -0.0011465190
> 7   1 Target Rechts -0.0022225320
> 8   2 Target Rechts  0.0039010500
> 
> these data I plotted with xyplot(data=dummyy,
> x~hemi|target,groups=run,type="p")
> 
> the same I do have with standard errors of means...
> 
> How could I attach errorbars to the datapoints?  I found some R-code from
> Dec 2002 but I dont work (and I did not understand it...)
> 
> Thanks for helping me, maybe others out there will find it usefull too.
> 
> Best
> Ronny

library(Hmisc)
?xYplot

Frank Harrell

-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University