--- On Thu, 10/9/08, Oliver Bandel <[EMAIL PROTECTED]> wrote:
> From: Oliver Bandel <[EMAIL PROTECTED]>
> Subject: Re: [R] plot-parameter pch without influence when plotting a
> data-frame
> To: "Gerhard Schön, UKE Hamburg" <[EMAIL PROTECTED]>
> Cc: "R-help" <r-help@r-project.org>
> Received: Thursday, October 9, 2008, 9:00 AM
> Zitat von "Gerhard Schön, UKE Hamburg"
> <[EMAIL PROTECTED]>:
>
> > 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.
Have a look at ?points for some discussion of pch values. Some values are
undefined.
Try something like
mm <- matrix(1:128, nrow= 4)
matplot(mm, pch=1:128)
to get some idea of what symbols are available.
>
> Do you know how to plot very small dots?
> pch=20 makes dots that are too big for my plot.
matplot(mm, pch=20, cex=.5)
> Is there a possibility to have more detailed control on the
> symbols?
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