hello! i need help for a specific graphic issue
I don't think that you're actually creating a
scatterplot if the x-axis is a factor. You're getting
a boxplot.
If you want a scatterplot then something like this
might work.
======================================================
means<-c(4,6,8)
stand.error<-c(0.1,0.3,0.5)
aa <- factor(c("A","B","C","A", "C", "C"))
dd <- 1:length(levels(aa))
plot(dd, means, xaxt="n")
arrows(dd, means + stand.error, dd, means-stand.error,
code=3, angle=90)
axis(1, at=dd, labels=levels(aa))
=======================================================
--- Giacomo Prodi <bonoricus at yahoo.it> 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) La web mail pi? usata al mondo. http://it.docs.yahoo.com/mail/overview/index.html
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