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https://issues.apache.org/jira/browse/MAHOUT-1221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maysam Yabandeh updated MAHOUT-1221:
------------------------------------
Description:
The implementation returns a new vector if it already does not exist. But it
does not add the new vector to the matrix. So, the later changes will not be
reflected in the matrix.
if (res == null) {
res = newRandomAccessSparceVector(columnSize());
//now the row must be added by assignRow(row, res);
}
return res;
> SparseMatrix.viewRow is sometimes readonly
> ------------------------------------------
>
> Key: MAHOUT-1221
> URL: https://issues.apache.org/jira/browse/MAHOUT-1221
> Project: Mahout
> Issue Type: Bug
> Components: Math
> Affects Versions: 0.7
> Reporter: Maysam Yabandeh
> Priority: Minor
> Fix For: 0.7, 0.8
>
>
> The implementation returns a new vector if it already does not exist. But it
> does not add the new vector to the matrix. So, the later changes will not be
> reflected in the matrix.
> if (res == null) {
> res = newRandomAccessSparceVector(columnSize());
> //now the row must be added by assignRow(row, res);
> }
> return res;
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