[R] Change Data Point Label in biplot()

[Prof Brian Ripley]

On Mon, 13 Jun 2011, Bao, Yongjian (GE Healthcare) wrote:

> I'm a new user of R, and trying to display the result of a PCA data set
> with biplot(). Biplot() draws the projections of data points to the
> first two principal axis with a text level (I guess it is the name of
> the data points). This makes the picture very crowed. I tried to go
> through R documentation to figure out how to change the data point
> labels to a symbol, say circle, triangle or cross without text, but the
> documentation did not say anything about that. I found similar questions
> in archive of this mailing list but could not find a solution answer.
>
> Can anyone help me how to change the data point labels of biplot() to a
> simple symbol without text?

The help does: see the argument 'xlabs', and also '...' (for whch you 
could specify a vector for the graphical parameter 'pch').

>
>
>
> Thanks
>
>
>
> Yongjian
>
>
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>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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