Sebastian Schelter created MAHOUT-1884:
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Summary: Allow specification of dimensions of a DRM
Key: MAHOUT-1884
URL: https://issues.apache.org/jira/browse/MAHOUT-1884
Project: Mahout
Issue Type: Improvement
Affects Versions: 0.12.2
Reporter: Sebastian Schelter
Assignee: Sebastian Schelter
Priority: Minor
Currently, in many cases, a DRM must be read to compute its dimensions when a
user calls nrow or ncol. This also implicitly caches the corresponding DRM.
In some cases, the user actually knows the matrix dimensions (e.g., when the
matrices are synthetically generated, or when some metadata about them is
known). In such cases, the user should be able to specify the dimensions upon
creating the DRM and the caching should be avoided.
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