A. 宸茬煡鍗忔柟宸鐭╅樀鐢∕ATLAB鐢熸垚闅忔満姝ｆ佸垎甯幂殑鍙屽彉閲
鐩存帴浣跨敤matlab镊甯︾殑鍑芥暟mvnrnd灏卞彲浠ュ疄鐜颁简锛宧elp鏂囨。閲岄溃链変竴涓镊甯︾殑渚嫔瓙锛
mu = [1 -1]; Sigma = [.9 .4; .4 .3];
r = mvnrnd(mu, Sigma, 500);
plot(r(:,1),r(:,2),'.');
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