How to get the min x, max x, min y and max y of a certain figure in MATLAB?

Question

I want to design a function, which can add text in the right corner of the figure according to user's input parameter ('UpperLeft', 'UpperRight', 'LowerLeft', 'LowerRight'). I implement it in the following way: If I want to add text in the upper left corner, I firstly get the min x and max y of the axis in the figure, then use text(min_x, max_y, 'text') to draw it. But I don't know what function can get the min x and max y. And if there any other way to implement the function I want?

Answer 1

x = 3*sin(linspace(0,10,100));
figure
plot(x)
xl = xlim
yl = ylim
% upper left (ish), you'll want to position the text a little down and to
% the right depending on the dimensions of the plot
text(xl(1), yl(2), 'text')