matlab .m code to gui

[fencer]

Hello,

i have been a lot confused about to make a gui in matlab.

i would like this simple code of a 3d function to be made with gui

[x,y]=meshgrid(260:0.1:420,0.8:0.1:2);
e=1.05e-12;
e0=8.15e-14;
k=8.6e-5;
q=1.6e-19;
Nd=10e20;
z=sqrt(y.*(2*e*e0*((x.*k)/q))/(q*Nd))
mesh(x,y,z)

i would like to have cells for e,e0,q,k,xmax,xmin,ymax,ymin that will have an existing value but the user can change them after the plot button (in that case 3D plot-mesh) ang an an axis place.
thanks