how can I read the number in figure(matlab) without rounding?

here in the figure, you can see that i cannot read the difference between the values

Answer 1

[Adam Danz]

This is a precision issue with datatips. See this answer to learn how to specify the level of precision in datatips.

Demo of method 2 from that link:

x = linspace(0,2*pi,100); 
y = sin(x)*.0001 + 37.5; 
ax = cla(); 
h = stairs(ax,x,y);
ax.XAxis.Exponent = 0;

% Modify datatip precision
h.DataTipTemplate.DataTipRows(2).Format = '%.5f';  % Y to 5dp

% Show datatip
datatip(h, h.XData(25), h.YData(25));
datatip(h, h.XData(47), h.YData(47));