workfile mc u 1 2 Matrix(10000,1) f Vector(2) v1 V1.fill 34.43 mtos(v1,x) !a=0.9 !b=0.1 For !k=1 to 10000 series u=0.05*nrnd smpl @first @first series v=0 smpl @first+1 @last series v=!a*v(-1)+!b*u(-1)+u series y=x*exp(v) equation eql.ls y=c(1)*x f(!k,1)=c(1) next show f expand 1 10000 smpl 1 10000 mtos(f,gr)

怎么一运行就说near singular matrix，是多重共线性造成的？那该怎么修改？