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[ÇóÖú] matlabÇóÖúÎÊÌâ

clc;
y=[7.97 8.74 9.27 9.99 10.53 11.4 11.97 12.6 13.17 9.19 10.76 9.49 10.61 14.52 13.83];
x1=[2 2 2 2 2 2 2 2 2 3 5 4 3 2 2];
x2=[0 1 2 3 4 5 6 7 8 0 1 0 2 0 9];
x3=[0 0 0 0 0 0 0 0 0 1 1 0 1 0 0];
x4=[0 0 0 0 0 0 0 0 0 0 1 1 0 0 0];
X=[ones(length(y),1),x1',x2',x3',x4'];
Y=y';
X=[ones(length(y),1),x1',x2',x3',x4'];
Y=y';
[b,bint,r,rint,stats]=regress(Y,X);
b,bint,stats
ÒÔÉÏÊdzÌÐò£¬µ«Êǽá¹ûX4ÖµÊÇ0¡£°´ÕÕʵ¼ÊÇé¿ö£¬²»Ó¦¸ÃÊÇ0£¬ÇóÖúÎÊÌâ³öÔÚÄÄÀ
b =

    9.2742
         0
   -0.0377
    0.4076
    0.1480


bint =

    5.1797   13.3688
         0         0
   -3.3549    3.2796
    0.0486    0.7666
   -1.4034    1.6993


stats =

    0.3960    2.4039    0.1229    2.9100
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