Jari,

Sure you right, maybe I have to study better the function "points", and off
course I did a mistake, I would mean "cex", I know that's correct argument
for the points dimensions...
However, I''ll try to uncover the problem and then post the code.. If I find
one that works well!
Thank you very much,

Gian


2010/5/22 Jari Oksanen <jari.oksanen@oulu.fi>

> On 22/05/10 14:14 PM, "Gian Maria Niccolò Benucci" <gian.benucci@gmail.com
> >
> wrote:
>
> > Jari,
> >
> > Sorry, in the future I will spcify the pakages where the functions are
> and
> > then I'll post the query.
> >
> > Anyway, I tried your code, as you suggested:
> >
> >> plot(NMS.2.new, type = "n")
> >> with(env.table, points(NMS.2.new, pch=as.numeric(Host)), pch=1.5,
> > col=blue)
> >> with(env.table, legend("topleft",
> > leg=levels(Host),pch=seq_along(length(Host))))
> >
> > But:
> > - the "pch" and the "col" commands do not make any dimensional change of
> > points on the graph (I treid using different pch values)
> > - the legent is print in the left top but the symbols are the same for
> the
> > two host I have in the env.table, (two open circles) instead of the open
> > circles and the open triangles I had into the graph.
> >
> > I'll try to study better the functions you suggested me and I will post
> the
> > new code if I find a solution that works well.
> > Thank you very very much,
> >
> >
> Gian,
>
> 'pch' and 'col' do not change the sizes of the plotting character, but
> 'cex'
> does. Study the documentation of the appropriate functions ('points') to
> see
> what you can do.
>
> If you do not tell us what you want to do it is very difficult to tell you
> how to do it. I didn't know you wanted to change the sizes of the
> characters.
>
> The code was untested. Perhaps I should have written legend(..., pch =
> seq_along(length(levels(Host)))), but I don't care to try to see if that
> works (perhaps you can try?).
>
> Cheers, jari oksanen
>
>

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