plotmatrix - how to change the color according to one variable in data?

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Karolina
Karolina 2015-11-26
回答： Tobias Held 2022-2-28
I have dataset with 5 different variables. I would like to generate plotmatrix where all plots are colored according to the first variable (first variable has values "one" or "two". I used the following code, but all my plots still have the same color.
if Y(:,1) > 1
plotmatrix(Y,'g');
hold on
else plotmatrix(Y,'r');
end
hold off

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回答（3 个）

Adam
Adam 2015-11-26
编辑：Adam 2015-11-26
The final example of
doc plotmatrix
shows how colour individual plots if that is what you are aiming to do (at least in the help for R2015b and it mentions the notation change for R2014a so I assume it has been there for a few versions).
I haven't followed the steps myself, but one of the graphs shown has a different colour to the rest.
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Karolina
Karolina 2015-11-27
Thank you, but it is not what I am looking for. I do not want to change the color of one graph. I want to color all graphs according to one variable (the first column in my data) which has values 1 or 2, so every graph should be represented by two colors: groups of data which have 1 in one color and group of data which have 2 in another color.
Matthieu Heitz
Matthieu Heitz 2017-7-17
The function 'gplotmatrix()' does this exactly, pass your first column of labels as the 'group' parameter. You need the Statistics and MachineLearning Toolbox though.

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Stephen23
Stephen23 2017-7-17
plotmatrix(Y(Y(:,1)==1,:),'g');
hold on
plotmatrix(Y(Y(:,1)==2,:),'r');
Tobias Held
Tobias Held 2022-2-28
I was looking for the same function, but with a continuous scale. However, I was not able to find an answer and made a function myself. I am happy to receive feedback :)
https://ch.mathworks.com/matlabcentral/fileexchange/107360-matlab-plotmatrixcolobar?s_tid=prof_contriblnk

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