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Posted to dev@hama.apache.org by "lujing.zui (JIRA)" <ji...@apache.org> on 2014/03/02 15:05:20 UTC
[jira] [Created] (HAMA-882) errors in eigenValues and eigenVectors
wiki page
lujing.zui created HAMA-882:
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Summary: errors in eigenValues and eigenVectors wiki page
Key: HAMA-882
URL: https://issues.apache.org/jira/browse/HAMA-882
Project: Hama
Issue Type: Documentation
Components: documentation
Reporter: lujing.zui
Priority: Trivial
In "EigenValues and EigenVectors" wiki page.
step 3 in methods
"each rotation just effects 4 elements of the matrix".
this is error. actully echo rotation effects two rows and two cols, matirx is symmetric, so effects two rows.
4 elements is totally WRONG.
and the pseudocode described below, it's confusing.
c,s computed as this which is not metioned.
c = cos(\theta)
s = sin(\theta)
someone can improve this page, despite i know the JacobiEigenValue removed in the repo?
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