How to calculate the area between X-Axis, Y-Axis and the (60) contour line?

How to calculate the area between X-Axis, Y-Axis and the (60) contour line?

Code of the contour line:

x = 1:0.2:2;
y = 1:0.2:3;
[X,Y] = meshgrid(x,y);
Z = 1000*(X.*exp(-X.^2-Y.^2));
contour(X,Y,Z,[20 60 80],'ShowText','on')

Answer 1

[Matt J]

Using this FEX download,

https://www.mathworks.com/matlabcentral/fileexchange/74010-getcontourlinecoordinates

x = 1:0.2:2;
y = 1:0.2:3;
[X,Y] = meshgrid(x,y);
Z = 1000*(X.*exp(-X.^2-Y.^2));
cm=contour(X,Y,Z,[20 60 80],'ShowText','on');

[~, V]=getContourLineCoordinates(cm);

p=polyshape([1,1; V{2}]);

hold on;
plot(p);
hold off

Area=area(p)

Area = 0.1006