大师作文网matlab中多项式求解是用什么算法实现的?
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matlab中多项式求解是用什么算法实现的?
我问的是内部的算法啊,不是matlab怎么编程.
我问的是内部的算法啊,不是matlab怎么编程.
= roots(c);
Algorithm:
The algorithm simply involves computing the eigenvalues of the companion matrix:
A = diag(ones(n-1,1),-1);
A(1,:) = -c(2:n+1)./c(1);
eig(A)
It is possible to prove that the results produced are the exact eigenvalues of a matrix within roundoff error of the companion matrix A, but this does not mean that they are the exact roots of a polynomial with coefficients within roundoff error of those in c.
Algorithm:
The algorithm simply involves computing the eigenvalues of the companion matrix:
A = diag(ones(n-1,1),-1);
A(1,:) = -c(2:n+1)./c(1);
eig(A)
It is possible to prove that the results produced are the exact eigenvalues of a matrix within roundoff error of the companion matrix A, but this does not mean that they are the exact roots of a polynomial with coefficients within roundoff error of those in c.
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