using different colours of points in a biplot

Hi,

I have generated a biplot (used for PCA) and I wanted to use different colours for points according to my dataset. Right now, there is only one colour (red) for everything.

How do I this?

Thanks

Answer 1

[dpb]

From the doc,

h = biplot(coefs,'Name',Value) specifies one or more name/value input pairs and returns a column vector of 
handles to the graphics objects created by biplot. The h contains, in order, handles corresponding to 
variables (line handles, followed by marker handles, followed by text handles), to observations 
(if present, marker handles followed by text handles), and to the axis lines.

So, save the handle and retrieve the various handles from within and set properties of them as desired.

Just a vector of handles isn't all that convenient a form in which to return the information although know the number of variables and components to be able to count...