matlab 二维高斯分布

这里给出话二维高斯分布的matlab作图代码：

>> mu = [-1, 2];
>> sigma = [1 0;0 1];
>> [X, Y] = meshgrid([-20:0.5:20]);
>> p = mvnpdf([X(:),Y(:)],mu,sigma);
>> p = reshape(p,size(X));
>> figure(2)
>> surf(X,Y,p)
>> shading interp
>> colorbar