I am not certain what plot you want to use or what result you want.
Perhaps something like this —
x = linspace( 0, 5);
y = linspace(-5, 5);
z = exp(-((x-2.5).^2 + y.^2));
figure
scatter3(x, y, z, 25, z, 'filled')
colormap(turbo)
colorbar
view(45,30)
x = randn(1, 1000);
y = randn(1, 1000);
z = exp(-(x.^2 + y.^2));
figure
scatter3(x, y, z, 25, z, 'filled')
colormap(turbo)
colorbar
.
