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x1=[21,26,31,21,26,31,21,26,31,21,26,31,21,26,31,21,26,31]'; x2=[133,143,153,133,143,153,143,153,133,153,133,143,143,153,133,153,133,143]'; x3=[3.9,4.4,4.9,4.4,4.9,3.9,3.9,4.4,4.9,4.9,3.9,4.4,4.9,3.9,4.4,4.4,4.9,3.9]'; y=[40.69803,40.24597,39.66466,39.65027,39.3111,41.64728,39.43865,39.07176,42.09825,36.28181,42.55311,41.77374,37.45602,40.11952,43.03311,37.21668,40.57048,42.8215]'; F=[ones(size(y)),x1,x2,x3]; a=F\y ¿ÉµÃa=57.5312 0.3383 -0.1217 -1.9826 ËùÒÔ y=57.5312+0.3383*x1+(-0.1217)*x2+(-1.9826)*x3£» Áí»¹¿ÉÒÔ×öÎó²îͼ£¬ e=z-y; >> stem(1:18,e); >> hold on; >> stem(1:18,y,'r'); >> hold off; >> legend('e','y') ¼´¿ÉµÃµ½Îó²îͼ¡£ |
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