changing colours of the data points in a biplot
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Suppose I have:
A = rand(100,5);
[coefs,score] = pca(A);
biplot(coefs(:,1:2),'Scores',score(:,1:2),'VarLabels',vbls);
There is a default size and colour of the data points that appear on the biplot.
I want to customise my own to show different aspects of my data. For example: I want the first 20 points to be green coloured, second 20, to be red, etc etc. How do I this?
2 Comments
Adam
on 16 Apr 2019
You can use the
hPlots = biplot(coefs(:,1:2),'Scores',score(:,1:2),'VarLabels',vbls);
syntax to return the plot handles, although you get literally one handle per point on the graph so you get a large number of them that you would have to fish through and set the colours on. You can set lots of colours at a time with e.g.
set( hPlots, 'Color', 'b' )
or whatever, but you need to index only those plots you want and remove the various other lines and bits and bobs from your array of handles.
Heidi Hirsh
on 29 Sep 2020
Can someone elaborate on how to do the indexing to select a subset of the points? I've tried doing so and the data plots in different locations if I select a subset.
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