R help - Jun 2011 - Change Data Point Label in biplot()

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?

 

Thanks

 

Yongjian


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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
>
>
> 	[[alternative HTML version deleted]]
>
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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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