Re: [R] what's wrong with plot(..., type="p")?

From: Ivan Calandra <ivan.calandra_at_uni-hamburg.de>
Date: Tue, 26 Apr 2011 15:20:51 +0200

Dear Bob,
Thanks for your answer! I didn't think factors would be a problem for plot() Ivan

Le 4/26/2011 12:21, Bob O'Hara a écrit :
>
>
> On 26 April 2011 12:08, Ivan Calandra <ivan.calandra@uni-hamburg.de
> <mailto:ivan.calandra_at_uni-hamburg.de>> wrote:
>
> Dear users,
>
> I'm trying to get a dot plot but always end up with a boxplot. Can
> someone please tell me what I am doing wrong?
>
> df <- structure(list(FACETTE = structure(c(1L, 1L, 1L, 1L, 2L, 2L,
> + 2L, 2L), .Label = c("base", "tip"), class = "factor"), Sq =
> c(274836,
> + 0.74182, 0.709205, 0.984552, 279869, 255712, 26566, 301464)),
> .Names = c("FACETTE",
> + "Sq"), class = "data.frame", row.names = c(1L, 2L, 3L, 4L, 6L,
> + 7L, 8L, 9L))
>
> with(df, plot(Sq~FACETTE, type="p"))
> with(df, plot(Sq~FACETTE, type="n"))
>
> I get boxplots in both cases. What should I do to get points
>
> Don't use a factor?
>
> with(df, plot(Sq~as.numeric(FACETTE), type="p"))
>
> works, but you then need to play a bit with the x axis to get the
> labels etc. right:
>
> with(df, plot(Sq~as.numeric(FACETTE), type="p", xaxt="n"))
> axis(1, c("base", "tip"), at=c(1,2))
>
> Bob
>
> --
> Bob O'Hara
>
> Biodiversity and Climate Research Centre
> Senckenberganlage 25
> D-60325 Frankfurt am Main,
> Germany
>
> Tel: +49 69 798 40216
> Mobile: +49 1515 888 5440
> WWW: http://www.bik-f.de/root/index.php?page_id=219
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> <http://www.jnr-eeb.org>

```--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra_at_uni-hamburg.de

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