You could pass color values as follows
n = 1000;
X = rand(n, 1); Y = rand(n, 1); Z = rand(n, 1); C = hypot(X, Y);
size = 500;
scatter3(X, Y, Z, size, C, '.');
colormap jet
Or do you want to take a slice along the xy-plane? Then you should probably look at this page .
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