matlab - 在 MATLAB 中生成高斯数据集

Question

我想生成一个高斯数据集。该数据集包括从四个二维高斯类中随机抽取的总共 800 个样本，具有以下分布:

我如何使用 MATLAB 做到这一点。我不是 MATLAB 专家!

Answer 1

以下需要 Statistics Toolbox:

% The means of the Gaussians
mu    = [-3,0;0,0;3,0;6,0]; 

% The covariance matrix
sigma = [0.5,0.05;0.05,0.5]; 

% The mixing proportions of the Gaussians
p     = [0.25,0.25,0.25,0.25]; 

% Make a Gaussian mixture distribution
myMixtureDistribution = gmdistribution(mu,sigma,p); 

% Draw random samples from the distribution
myDataSample = myMixtureDistribution.random(800);