How to make mesh or contour by using just x,y,z coordinates data ?

Hello, teacher

I have a question about graph.

I want to make mesh or contour graph but i can't, because x,y,z is just coordinates.

How should i write code?

Please give your good ideas.

Answer 1

[Elias Gule]

[xx,yy,zz] = meshgrid(x,y,z);
contour(xx,yy,zz)