> 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,
> 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.
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University