how to generate a dome shape by using defined points

Hi all,

i am trying to generate a semi ellipsoidal dome shape by using x, y, z values and below is my code. in the code i defined the x,y,z values but i am unable to assign those values to sphere.

any suggestions and thanks in advance

clc
x = [65 55.2125 50.8267 46.7398 42.9232 39.3476 35.9815 32.7882 29.7175 26.6833 23.4690 18.7605];
y = x;
z = [0.0,0.9,2.7,5.2,8.2,11.8,15.8,20.3,25.2,30.7,37.1,47.5]; % max height of dome is 47.5
[x,y,z] = sphere(20);     
x = x(12:end,:);       
y = y(12:end,:);      
z = z(12:end,:);       
r = 65;                % radius of the dome 
surf(r.*x,r.*y,r.*z); 
axis equal;