A. 宸茬煡鍗忔柟宸鐭╅樀鐢∕ATLAB鐢熸垚闅忔満姝ｆ佸垎甯冪殑鍙屽彉閲
鐩存帴浣跨敤matlab鑷甯︾殑鍑芥暟mvnrnd灝卞彲浠ュ疄鐜頒簡錛宧elp鏂囨。閲岄潰鏈変竴涓鑷甯︾殑渚嬪瓙錛
mu = [1 -1]; Sigma = [.9 .4; .4 .3];
r = mvnrnd(mu, Sigma, 500);
plot(r(:,1),r(:,2),'.');
鍏朵腑Sigma灝辨槸鍗忔柟宸鐭╅樀錛宮u涓轟袱涓鍙橀噺鐨勫潎鍊礆紝鏍規嵁浣犵殑闇瑕佽懼畾灝辮屼簡錛屽悗闈㈣繕鏈変竴涓鍙傛暟鏄鐢熸垚闅忔満鏁涓鏁