how to plot correlation matrix shown by colored circles?

How Can I plot this kind of correlation matrix? this figure was created using R

Answer 1

[Chunru]

% Generate R
n= 6;
r = magic(n);
r = triu(r);
r(r==0) = NaN

r = 6×6

35 1 6 26 19 24 NaN 32 7 21 23 25 NaN NaN 2 22 27 20 NaN NaN NaN 17 10 15 NaN NaN NaN NaN 14 16 NaN NaN NaN NaN NaN 11

% Plotting
[xx, yy] = meshgrid(1:n, 1:n);
scatter(xx, yy, r*20, 'filled');
set(gca, 'YDir', 'reverse');
colorbar
axis off

% use text to annotate