Can MATLAB plot a graph like this? (Ignore the black lines and light blue areas; I only care about the red and blue points.)

Hello everyone, I want to plot the image below. Please ignore the other parts; I'm mainly focused on the red and blue points. I know the scatter function can plot points of different sizes, but the issue is with the red legend next to it. Can MATLAB generate a legend like this, reflecting the size of the points? Looking forward to any responses.

Answer 1

[Cris LaPierre]

This is a bubble chart. You can create this in MATLAB using bubblechart

The legend isn't exactly the same, but conveys the relationship between size and value.

[ma Jack]

It seems that the bubblechart legend can have at most three bubbles. Is it possible to change this? I'd like to create a legend like the red one in the image above, made up of many continuously varying sized points.

[Cris LaPierre]

The only way I can think to do that would be to manually create it yourself. Essentially, you'd create a second axes next to your plot and then plot the circle sizes you want positioned the way you want them.

% create dummy data
t = 0:0.1:10;
y = sin(t);
sz = (y+1)*50;
figure
scatter(t,y,sz);
ax1 = gca;

% create legend
ax2 = axes('Position',[ax1.Position(1)+ax1.Position(3)+0.005 ax1.Position(2) 0.05 ax1.Position(4)]);
scatter(ax2,0,1:100,1:100,'r')
ax2.YAxisLocation = 'right';
xticks(ax2,[])
yticks(ax2,0:20:100)
yticklabels(0:2:10)
ylabel('log_{10}Q')

[Cris LaPierre]

Here's perhaps a slightly cleaner way.

% create dummy data
t = 0:0.1:10;
y = sin(t);
sz = (y+1)*50;

tiledlayout(1,11)
nexttile([1 10])
scatter(t,y,sz);

ax = nexttile;
scatter(0,1:100,1:100,'r')
ylabel('log_{10}Q')

ax.YAxisLocation = 'right';
xticks([])

% Customimze the displayed size (may not be necessary)
yticks(0:20:100)
yticklabels(0:2:10)

[ma Jack]

Thank you, sir, this is really a great method！

Answer 2

[Image Analyst]

Instead of bubble chart, try scatter where you can specify the color and size of each marker.