Hi, There is a simple sub-task. https://issues.apache.org/jira/browse/HAMA-184
Here's the pseudo code, should be ported to map/reduce model.
//finds the diagonal elements of matrix A and puts them into matrix B
for (int i = 0; i < n; i++) {
B[i][i] = A[i][i];
}
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Best Regards, Edward J. Yoon @ NHN, corp.
[email protected]
http://blog.udanax.org
