How can I get use property colormap from heatmap to color the data points of (x,y) based on the values from r?

How can I use colormap(hot) to color the data points of (x,y) based on the values from r?

x = 150:50:5000;
y = -x+2000/5;

a = 30;
b = 0;
r = a+(b-a)*rand(1.length(x));

allData = [x;y;r];

figure;
heatmap(x,y, 'colormap', hot)
xlim([min(x) max(x)])
ylim([min(y) max(y)])

Answer 1

[Voss]

x = 150:50:5000;
y = -x+2000/5;

a = 30;
b = 0;
% r = a+(b-a)*rand(1.length(x));
r = a+(b-a)*rand(1,length(x));

figure()
scatter(x,y,[],r,'.')
colormap('hot') % or 'jet', or wtf you want
colorbar() % optional (once requested; no longer requested)
axis('tight')

[Rookie Programmer]

Thank you Voss. Since I posted the question I found an alternative method to complete the task using the plotting function heatmap. I think your method works best.

-MB