Try this —
figure
h = animatedline('linewidth',2);
axis([1 7 1 7])
axis ij
grid on
x=1:4;
n = 100;
xx=linspace(x(1),x(end),n);
y = [1 1 2 1];
yy = interp1(x,y,xx);
for ci=1:n
addpoints(h,xx(ci),yy(ci));
pause(0.03);
drawnow
if yy(ci) == max(y)
text(xx(ci), yy(ci), '$\uparrow Maximum$', 'Horiz','left', 'Vert','top', 'Interpreter','latex')
end
if ci == n
text(xx(ci), yy(ci), '$\leftarrow End$', 'Horiz','left', 'Vert','middle', 'Interpreter','latex')
end
end
EDIT — (7 Jul 2021 at 16:40)
Corrected typographical error.
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