数据的可视化

                        数据中没有方程式的限制

%没有方程，只有数据，进行数据的可视化
[x,y] = meshgrid(1:10);     %构建测量网络，根据测量的数据点来判断所要构建的数据长
h=[0,0.02,-0.12,0,-2.09,0,-0.58,-0.08,0,0;...
0.02,0,0,-2.38,0,-4.96,0,0,0,-0.1;...
0,0.1,1.00,0,-3.04,0,-0.53,0,0.1,0;...
0,0,0,0,3.52,0,0,0,0,0;...
 -0.43,-1.98,0,0,0,0.77,0,2.17,0,0;...
0,0,-2.29,0,0.69,0,2.59,0,0.30,0;...
 -0.09,-0.31,0,0,0,4.27,0,0,0,-0.01;...
0,0,0,5.13,7.40,0,1.89,0,0.04,0;...
0.1,0,0.58,0,0,1.75,0,-0.11,0,0;...
0,-0.01,0,0,0.3,0,0,0,0,0.01];    %测量数据点
[xi,yi] = meshgrid(1:0.1:10);  %构建插值网络
hi = interp2(x,y,h,xi,yi,'spline');
surf(hi);   %画出地貌图
xlabel('x'),ylabel('y'),zlabel('z');

                数据中有方程式的限制

[x,y] = meshgrid(-2:0.2:2,-2:0.2:2);
z = x.*exp(-x.^2-y.^2);
surf(x,y,z);