爱华网使用griddata插值
A=[1.486,3.059,0.1;2.121,4.041,0.1;2.570,3.959,0.1;3.439,4.396,0.1;4.505,3.012,0.1;3.402,1.604,0.1;2.570,2.065,0.1;2.150,1.970,0.1;1.794,3.059,0.2;2.121,3.615,0.2;2.570,3.473,0.2;3.421,4.160,0.2;4.271,3.036,0.2;3.411,1.876,0.2;2.561,2.562,0.2;2.179,2.420,0.2;2.757,3.024,0.3;3.439,3.970,0.3;4.084,3.036,0.3;3.402,2.077,0.3;2.879,3.036,0.4;3.421,3.793,0.4;3.953,3.036,0.4;3.402,2.219,0.4;3.000,3.047,0.5;3.430,3.639,0.5;3.822,3.012,0.5;3.411,2.385,0.5;3.103,3.012,0.6;3.430,3.462,0.6;3.710,3.036,0.6;3.402,2.562,0.6;3.224,3.047,0.7;3.411,3.260,0.7;3.542,3.024,0.7;3.393,2.763,0.7];
x=A(:,1);y=A(:,2);z=A(:,3);
scatter(x,y,5,z)%散点图
figure
[X,Y,Z]=griddata(x,y,z,linspace(1.486,4.271)',linspace(1.604,4.276),'v4');%插值
pcolor(X,Y,Z);shading interp%伪彩色图
figure,contourf(X,Y,Z) %等高线图
figure,surf(X,Y,Z)%三维曲面
x = rand(1,12);y = rand(1,12);z = rand(1,12); % now use some random z axis dataxi = linspace(min(x),max(x),30); % x interpolation pointsyi = linspace(min(y),max(y),30); % x interpolation points[Xi,Yi] = meshgrid(xi,yi); % create grid of x and yZi = griddata(x,y,z,Xi,Yi); % grid the data at Xi,Yi points% Zi = griddata(x,y,z,Xi,Yi, 'linear') % same as above(default)% Zi = griddata(x,y,z,Xi,Yi, 'cubic') % triangle based cubic interpolation% Zi = griddata(x,y,z,Xi,Yi, 'nearest') % triangle based nearest neighbor% Zi = griddata(x,y,z,Xi,Yi, 'invdist') % inverse distance methodmesh(Xi,Yi,Zi)hold onplot3(x,y,z, 'ko') % show original data as wellhold offtitle('Figure 18.10: Griddata Example') 
