need to write values on contour plots

i want to write the objective function value on the contours.

which functiona should i use?

as of now i am using this

---% part of a code--

fcontour(f)

hold on;

plot(x,y,'*-r');

it is giving a following contour lines with different colours which are the values of function "f". so how can i print the values of function in these lines (not red lines).

while f is the function of x &y.

Answer 1

[Star Strider]

See: Contours with Labels

Answer 2

[Sudhakar Shinde]

these examples may help you:

%1
f = @(x,y) exp(-(x/3).^2-(y/3).^2) + exp(-(x+2).^2-(y+2).^2);
fc = fcontour(f);
fc.LineWidth = 1;
fc.LineStyle = '--';
fc.LevelList = [1 0.9 0.8 0.2 0.1];
colorbar


%2
figure
fcontour(@(x,y) x.*sin(y) - y.*cos(x), [-2*pi 2*pi], 'LineWidth', 2);
grid on
title({'xsin(y) - ycos(x)','-2\pi < x < 2\pi and -2\pi < y < 2\pi'})
xlabel('x')
ylabel('y')

https://www.mathworks.com/help/releases/R2019b/matlab/ref/fcontour.html