hi Giacomo,
consider this:
means<-c(4,6,8)
stand.error<-c(0.1,0.3,0.5)
lowlim<-means-stand.error
uplim<-means+stand.error
plot(as.factor(c("a","b","c")),means,ylim=c(min(lowlim),max(uplim)))
arrows(c(1:3),lowlim,c(1:3),uplim,code=3,angle=90)
Still, its just a workaround and I don't think you can get rid of the
horizontal mean-lines because this is actually a box-plot.
Otherwise you could try the 'errbar()' from the Hmisc package. I never used
that, but maybe it works.
Generally, if you have problems with plot-dimensions, you can get instant
information with 'locator()', which returns coordinates of mouse clicked
locations in plots.
cheers, /rené
> -----Ursprüngliche Nachricht-----
> Von: "Giacomo Prodi" <[EMAIL PROTECTED]>
> Gesendet: 12.03.08 11:56:45
> An: r-help@r-project.org
> Betreff: [R] hello! i need help for a specific graphic issue
>
> hello, ladyes and gentlemans.
>
> check this:
>
> means<-c(4,6,8)
> stand.error<-c(0.1,0.3,0.5)
>
> now i've strongly tryed to scatterplot the
> means(y-axis),by showing their sd with the
> arrow(..,code=3,angle=90) function.
> The problem is that my x-axis has categorical values
> (say, factor(x)), and the arrows() can't recognize
> them as right coordinates.
> ?????
> thank you all in advance
> B.F. insubria university (varese)
>
>
>
> La web mail più usata al mondo.
> http://it.docs.yahoo.com/mail/overview/index.html
>
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