[R] hello! i need help for a specific graphic issue

[bartjoosen]

quick (and dirty) solution:

y.up<- means+stand.error
y.dwn<- means-stand.error

plot(means,ylim=c(3.5,10))
for (i in 1:length(means)) arrows(i,means[i],i,y.up[i],length=0.1)
for (i in 1:length(means)) arrows(i,means[i],i,y.dwn[i],length=0.1)




Giacomo Prodi wrote:
> 
> 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)
> 
> 
> 
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> http://it.docs.yahoo.com/mail/overview/index.html
> 
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