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From Apache Wiki <wikidi...@apache.org>
Subject [Hama Wiki] Update of "EigenValuesAndEigenVectors" by udanax
Date Tue, 14 Jul 2009 08:02:52 GMT
Dear Wiki user,

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The following page has been changed by udanax:
http://wiki.apache.org/hama/EigenValuesAndEigenVectors

The comment on the change is:
Remove un-useful links

------------------------------------------------------------------------------
  
   1. Find the pivot: Get the largest off-diagonal element of the matrix.
  
- We use a M/R job to find the pivot p and its index in the matrix(pivot_row, pivot_col).
These are all done in PivotMapper and PivotReducer.
+ We use a M/R job to find the pivot p and its index in the matrix(pivot_row, pivot_col).
These are all done in !PivotMapper and !PivotReducer.
  
   1.#2 Compute the rotation parameters.
  
@@ -51, +51 @@

  S(ij) = s * S(kl) + c * S(ij)
  
  The Implementation of M/R job to rotate the matrix is a tricky. We do not rotate the matrix
- actually in Mapper & Reducer. We do this rotation during we scan over the matrix table.
Plz check the code in RotationInputFormat.
+ actually in Mapper & Reducer. We do this rotation during we scan over the matrix table.
Plz check the code in !RotationInputFormat.
  
   1.#4 Rotate the eigenvectors matrix.
  

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