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From "Andrew Palumbo (JIRA)" <>
Subject [jira] [Updated] (MAHOUT-1884) Allow specification of dimensions of a DRM
Date Tue, 20 Dec 2016 18:48:58 GMT


Andrew Palumbo updated MAHOUT-1884:
    Sprint: Jan/Feb-2017

> Allow specification of dimensions of a DRM
> ------------------------------------------
>                 Key: MAHOUT-1884
>                 URL:
>             Project: Mahout
>          Issue Type: Improvement
>    Affects Versions: 0.12.2
>            Reporter: Sebastian Schelter
>            Assignee: Sebastian Schelter
>            Priority: Minor
>             Fix For: 0.13.0
> 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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