roots function algorithm basis
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Dear Community,
I am trying to understand how works root(P), being P a polynomial. As far as I know, MATLAB uses the companion matrix of P and after it uses QR factorization to get the roots. However, I do not know which QR factorization method it uses. Is it householder QR method?
Thanks so much for your help,
Estanis
回答（1 个）
Neil Guertin
2017-8-11
0 个投票
According to the documentation, "The roots of the polynomial are calculated by computing the eigenvalues of the companion matrix". Eigenvalues are calculated using LAPACK functions.
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2017-8-8
2017-8-11
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