MATLAB: Different labels are represented by different colors

different colorlabels

Hello,

I have a scatter plot like figure1.

But I would like to show that same name with same color, different name with deferent color.

And also shown on legend.

As shown in Figure2, First row is name , second and third row are data.

Attachment is Test.mat , included matrix value .

Thanks.

Figure1:

Fifure2:

load test.mat
scatter(matrix(:,2),matrix(:,3),'ko','MarkerFaceColor','k')

Best Answer

gscatter(matrix(:,2), matrix(:,3), matrix(:,1))

Notice the gscatter() instead of scatter()

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MATLAB: Scatter plot with different colours

One input arg of scatter() is a list of colors for the various data points. So just make up a colorlist and pass it in, something like

myColors = zeros(size(matrix1, 1), 3); % List of rgb colors for every data point.
rowsToSetBlue = matrix2 == 1;
rowsToSetRed = matrix2 == 2;
myColors(rowsToSetBlue, :) = [0,0,1];
myColors(rowsToSetRed, :) = [1,0,0];

I haven't test that - it's just off the top of my head. If the last two lines don't work then you might have to use repmat() to make them exactly length(rowsToSetBlue) rows tall.

MATLAB: How scatter with groups in this format

doc gscatter.

Best Answer

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MATLAB: Scatter plot with different colours

MATLAB: How scatter with groups in this format

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