x1= -0.,0062286*f1+0078439*f2
x2= -0.007689 *f1+ 0.0097354*f2
x3= -0088181 *f1+ 0.0121158*f2
x4= -0077154 *f1+0. 0027643 *f2
x5= -0077154 *f1+0. 0027643 *f2
x6= -0077154 *f1+0. 0027643 *f2
x7= -0077154 *f1+0. 0027643 *f2
x8= -0077154 *f1+0. 0027643 *f2
x9= -0077154 *f1+0. 0027643 *f2
........
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x15= -0.0000163 *f1+0.0190928 *f2
大哥大姐,我该怎么设计程序回归出 f1=a1*x1+a2*x2+a3*x3+...+a15*x15
f2=b1*x1+b2*x2+b3*x3+...+b15*x15 的各个系数啊?求求您了