R help - Oct 2008 - plot-parameter pch without influence when plotting a data-frame

Hello,


I'm plotting a data-frame and use

plot(......., pch=...)

as well as setting pch with

par(pch=...)


but always get the default symbol (circle)
for the plots.

Does pch have no effect, when plotting a complete
data-frame, instead of certain values/vectors?


How to change the behaviour?
Do I have to change the print-function?

TIA,
   Oliver

Zitat von "Gerhard Sch?n, UKE Hamburg" <G.Schoen at uke.de>:
> what is the result of:
>
> df <- data.frame(x = 1:5, y = 1:5)
> plot(df, pch = 1:5)
It prints different symbols.

It seemed, that my pch-settings had an effect,
but some symbols were very similar, especially, when
a lot of them are plotted at similar places.


But I also had the effect, that some symbol numbers didn't
print enything, but *after* the loop I used, warnings were
printed.

Do you know how to plot very small dots?
 pch=20 makes dots that are too big for my plot.
Is there a possibility to have more detailed control on the symbols?

Ciao,
   Oliver