How to calculate eigen values and eigen vectors of a square matrix without using eig() function?

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I want to calculate eigen value and corresponding vector without using inbuilt function eig(). Please tell me algoritm for this.
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Walter Roberson
Walter Roberson on 13 Aug 2012
What is the reason for avoiding eig() ? So that people do not answer with something that has the same difficulty you are facing with eig() ?
At present your question sounds as if you are required to implement eigenvalue and eigenvector finding for a homework assignment; if that is the case, then the answer would be quite different than if you were (for example) having problems with running out of memory with eig()

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Answers (2)

Richard Brown
Richard Brown on 13 Aug 2012
"Please tell me algoritm for this."
  • Power Method
  • Inverse/Shifted Inverse Power Method
  • QR Algorithm
  • Jacobi Algorithm

Sean de Wolski
Sean de Wolski on 13 Aug 2012
doc eigs


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