I have a cloud of points scattered in a rectangle and some data in this points, a bit like this $$ x(:)=[x(1), x(2), ..., x(N)] \\ y(:)=[y(1), y(2), ..., y(N)] \\ u(:)=[u(1), u(2), ..., u(N)] $$ Here, I am looking for plotting a contour of the $u$ data on matlab. I tried several function on matlab; contour, contourf, contourc,... etc but in vain.
Any help please