how to add a label to a specific point on a fplot

I have the graph fplot(M_G) shown below. 

how do I label the point where the y-axis = 0. The actual x-value at y = 0 is 0.5607 but i do not know how to label it

[madhan ravi]

Maybe you’re looking for text()?

Answer 1

[Adam Danz]

This command will add a text label with a leftward arrow pointing to the coordinates

text(0.5607, 0, '\leftarrow My Favorite Point'))

or maybe you want a cross hairs at that point

xline(0.5607)
yline(0)

or maybe a simple marker that is defined in the legend

hold on 
plot(0.5607, 0, 'r*', 'displayName', 'My Favorite Point')
legend()