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

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

[Joaquin Caicedo Navarro]

Use the gplotmatrix command.

Answer 1

[Adam]

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.

[Star Strider]

Specifically see: Modify Scatter Plot Matrix After Creation.

[Karolina]

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]

The function 'gplotmatrix()' does this exactly, pass your first column of labels as the 'group' parameter. You need the Statistics and MachineLearning Toolbox though.

Answer 2

[Stephen23]

plotmatrix(Y(Y(:,1)==1,:),'g');
hold on
plotmatrix(Y(Y(:,1)==2,:),'r');

Answer 3

[Tobias Held]

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