gradient of bubble colors in a bubble chart

I want to create a bubblechart with three different bubble colors.

One group of bubbles is red, the second group is blue, and the color of the third group should be a mixture of red and blue. For instance, the left half of the bubble (circle) is red and the right half is blue. Or even better, a continuous trend from left to right.

Is there a way to do this?

Answer 1

[Cameron]

I'm not sure what you mean by "continuous trend from left to right". Can you post an image of what you're looking for? This was what I thought you meant.

x = 1:30;
y = rand(1,length(x));
sz = rand(1,length(x));

%get color gradient from https://www.mathworks.com/matlabcentral/fileexchange/25536-red-blue-colormap
m = length(sz);
if (mod(m,2) == 0)
    % From [0 0 1] to [1 1 1], then [1 1 1] to [1 0 0];
    m1 = m*0.5;
    r = (0:m1-1)'/max(m1-1,1);
    g = r;
    r = [r; ones(m1,1)];
    g = [g; flipud(g)];
    b = flipud(r);
else
    % From [0 0 1] to [1 1 1] to [1 0 0];
    m1 = floor(m*0.5);
    r = (0:m1-1)'/max(m1,1);
    g = r;
    r = [r; ones(m1+1,1)];
    g = [g; 1; flipud(g)];
    b = flipud(r);
end
c = [r g b]; 

t = tiledlayout(1,1);
nexttile
b = bubblechart(x,y,sz,c,'MarkerEdgeColor','k');
colormap(c)
colorbar

blgd = bubblelegend('Population');
lgd = legend('My data');
blgd.Layout.Tile = 'east';
lgd.Layout.Tile = 'east';

[SA-W]

Conceptually, I am looking for something similar as what was asked here. Instead of a rectangle, I want to fill a circle (bubble) with a gradient color.

You plotted a bubble chart where each bubble is filled with one color. I want a gradient color for a single bubble, not a constant color.

[SA-W]

Is it clear what I would like to have?