matlab中,关于多元函数的拟合问题已知x1={104020 104040 102900 103310 95855 98998 104174 99824 97708 100133 96785}x2={31.206 31.213 30.87 30.994 28.757 29.699 31.251 29.947 29.312 30.04 29.035} x3={83.216 83.234 82.319 82.651 76.684 79.198
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![matlab中,关于多元函数的拟合问题已知x1={104020 104040 102900 103310 95855 98998 104174 99824 97708 100133 96785}x2={31.206 31.213 30.87 30.994 28.757 29.699 31.251 29.947 29.312 30.04 29.035} x3={83.216 83.234 82.319 82.651 76.684 79.198](/uploads/image/z/3933694-46-4.jpg?t=matlab%E4%B8%AD%2C%E5%85%B3%E4%BA%8E%E5%A4%9A%E5%85%83%E5%87%BD%E6%95%B0%E7%9A%84%E6%8B%9F%E5%90%88%E9%97%AE%E9%A2%98%E5%B7%B2%E7%9F%A5x1%3D%7B104020+104040+102900+103310+95855+98998+104174+99824+97708+100133+96785%7Dx2%3D%7B31.206+31.213+30.87+30.994+28.757+29.699+31.251+29.947+29.312+30.04+29.035%7D+x3%3D%7B83.216+83.234+82.319+82.651+76.684+79.198)
matlab中,关于多元函数的拟合问题已知x1={104020 104040 102900 103310 95855 98998 104174 99824 97708 100133 96785}x2={31.206 31.213 30.87 30.994 28.757 29.699 31.251 29.947 29.312 30.04 29.035} x3={83.216 83.234 82.319 82.651 76.684 79.198
matlab中,关于多元函数的拟合问题
已知x1={104020 104040 102900 103310 95855 98998 104174 99824 97708 100133 96785}
x2={31.206 31.213 30.87 30.994 28.757 29.699 31.251 29.947 29.312 30.04 29.035}
x3={83.216 83.234 82.319 82.651 76.684 79.198 83.335 79.859 78.166 80.105 77.428}
Y={26.676 26.953 26.103 26.152 28.318 26.879 27.413 27.886 27.736 26.452 27.957}
怎么用matlab拟合出f(x1,x2,x3)来
matlab中,关于多元函数的拟合问题已知x1={104020 104040 102900 103310 95855 98998 104174 99824 97708 100133 96785}x2={31.206 31.213 30.87 30.994 28.757 29.699 31.251 29.947 29.312 30.04 29.035} x3={83.216 83.234 82.319 82.651 76.684 79.198
模型选为:y=b0+b1*x1+b2*x2+b3*x3.代码:
X0=ones(11,1);
X1=[104020 104040 102900 103310 95855 98998 104174 99824 97708 100133 96785]';
X2=[31.206 31.213 30.87 30.994 28.757 29.699 31.251 29.947 29.312 30.04 29.035]';
X3=[83.216 83.234 82.319 82.651 76.684 79.198 83.335 79.859 78.166 80.105 77.428]';
X=[X0 X1 X2 X3];
Y=[26.676 26.953 26.103 26.152 28.318 26.879 27.413 27.886 27.736 26.452 27.957];
[b,bint,r,rint,stats]=regress(Y,X)
其中,b输出一个向量,分别是b0 b1 b2 b3的值.代入模型即可.