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Hi,

I want to generate a bubble plot of a matrix. Such plots are possibe to make in 'R Studio'. I have attached an example image of the desired plot.

Is there a way to do so in MATLAB?

Thanks in advance.

Adam Danz
on 12 Jun 2021

Edited: Adam Danz
on 14 Jun 2021

> I want to have a sequence of colors corresponding to the the size of circles.

Assuming an n-by-m matrix r should be plotted such that point r(i,j) should appear at x=i, y=j, use meshgrid to create x and y coordinates and then set x, y, and r to bubbleplot as vectors.

The size of the bubbles is defined by |r|and the colors are based r. That way the size of the bubble shows the strength of the correlation and the color shows the direction. That could be switched around, of course.

% Create correlation matrix r

rng default % for reproducibility

r = rand(5)*2-1;

r(logical(eye(5))) = 1

% Create x and y coordinates and bubblechart

[x,y] = meshgrid(1:size(r,1), 1:size(r,2));

bubblechart(x(:),y(:),abs(r(:)),r(:))

% Cosmetics

colormap('jet')

grid on

set(gca,'xtick', 1:size(r,2), ...

'ytick', 1:size(r,1), ...

'YDir', 'Reverse'); % typically corr matrices use flipped y axes

xlabel('x index')

ylabel('y index')

cb = colorbar;

ylabel(cb, 'Correlation')

caxis([-1,1])

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