how to create a plot on a 3D sphere

Hello,

I'm quite new to Matlab and coming from MEL background. I have a script with loops and then translated to a sphere dimension. Can any one HELP me please as i really would like to generate a isosurface structure with spherical coordinates of the loop function especially.

Any help would be great, thank you.

figure
sphere
for k = 0: 0.5: 1;
  r= 1;
  for j=0: 1/2pi: 2/pi;
      phi= exp(j);
      for i=0:pi/2:2*pi;
          theta= exp(i);
          deltat = 0;
          scatter3(k,j,i,[]);
          hold on
          x=r*sin(i)*cos(j)
          y=r*sin(i)*sin(j);
          z=r*cos(i);
          S = zeros(3,1);
          S(1,1) = r*cos(j)*sin(i);
          S(2,1) = r*sin(i)*sin(j);
          S(3,1) = r*cos(i);