Learn How to Graph 3D in MATLAB

[Dell]

i am learning MATLAB, but have not yet learned anything do do with graphing, but need a program that can plot x.y.z graphs for my calculus work,

can someone please help me plot 3d graphs on MATLAB, for example

z=x²+2x+y²-y

how can i input x,y,z so that MATLAB will give me the surface graph of this function

 

[n0_3sc]

Modify as you need:

[X Y] = meshgrid(linspace(-10,10));
z=X.^2+2.*X+Y.^2-Y;
mesh(X,Y,z)

Alternatively use "surf" instead of "mesh".