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, /ren?
-----Urspr?ngliche Nachricht----- Von: "Giacomo Prodi" <bonoricus at yahoo.it> Gesendet: 12.03.08 11:56:45 An: r-help at 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 pi? usata al mondo. http://it.docs.yahoo.com/mail/overview/index.html
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