% Fig4_c

figure;
scatter(X1,Y1,30,'linewidth',2);
hold on
plot(X2,Y2,'linewidth',2)
box on
xlim([19.50,19.75])
ylim([-0.1,0.7])
set (gcf, 'Position', [596,546,270,230]); 
set(gca, 'TickDir', 'out')