You can display the 2D binned density using histogram2.
Demo: The plot on the left and right contain the same data.
x = 1:105;
ym = randn(800, numel(x)) .* linspace(2,35,numel(x)) + linspace(6,150,numel(x)) ;
xm = repmat(x,size(ym,1),1);
figure()
tiledlayout(1,2)
ax(1) = nexttile;
plot(x,ym,'b.')
grid on
axis tight
ax(2) = nexttile;
histogram2(xm,ym,'DisplayStyle','tile')
axis tight
cb = colorbar();
ylabel(cb, 'bin count')
linkaxes(ax)
Also try setting BinMethod or or bin edges in histogram2.
