[R] Plotting colour-coded points

[John Kane]

 With xx as your data.frame
 library(ggplot2)
 qplot(a, id, data=xx, color=b)

--- On Wed, 1/5/11, ANJAN PURKAYASTHA <anjan.purkayastha at gmail.com> wrote:

> From: ANJAN PURKAYASTHA <anjan.purkayastha at gmail.com>
> Subject: [R] Plotting colour-coded points
> To: r-help at r-project.org
> Received: Wednesday, January 5, 2011, 2:00 PM
> Hi,
> I have a file of the following type:
> 
> id    a        b
> 1   0.5       5
> 2   0.7      15
> 3   1.6       7
> 4    0.5     25
> ....................
> 
> I would like to plot the data in column a on the y-axis and
> the
> corresponding data in column id on the x-axis, so
> plot(a~id).  However I
> would like to colour these points according to the data in
> column b.
> column b data may be colour coded into the following bins:
> 0-9; 10-19;
> 20-29.
> Any idea on how to accomplish this?
> TIA,
> Anjan
> 
> -- 
> ===================================
> anjan purkayastha, phd.
> research associate
> fas center for systems biology,
> harvard university
> 52 oxford street
> cambridge ma 02138
> phone-703.740.6939
> ===================================
> 
>     [[alternative HTML version deleted]]
> 
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