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Date: Wed, 30 Jul 2014 00:32:38 +0000 (UTC)
From: "Dmitriy Lyubimov (JIRA)" <jira@apache.org>
To: dev@mahout.apache.org
Message-ID: <JIRA.12730486.1406643295779.71850.1406680358644@arcas>
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Subject: [jira] [Commented] (MAHOUT-1599) Add rand() operator to math-scala
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    [ https://issues.apache.org/jira/browse/MAHOUT-1599?page=3Dcom.atlassia=
n.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D140=
78693#comment-14078693 ]=20

Dmitriy Lyubimov commented on MAHOUT-1599:
------------------------------------------

ah.sorry. there's no nonZero iterator on matrices, it seems, only on vector=
s. So one of (not very efficient) corrections for the above i know of would=
 be=20


> Add rand() operator to math-scala
> ---------------------------------
>
>                 Key: MAHOUT-1599
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1599
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>    Affects Versions: 0.9
>            Reporter: Felix Sch=C3=BCler
>            Priority: Trivial
>              Labels: dsl, math, operator, random, scala
>         Attachments: MAHOUT-1599.patch
>
>
> I was looking at the scala-math operators and missed a rand(m, n) operato=
r that generates a m x n matrix filled with random numbers.
> I wanted random numbers from a uniform distribution over a specific inter=
val so I implemented a simple uniform random number generator.
> the rand(m, n, r) function takes any AbstractSamplerFunction and fills th=
e matrix entries with the numbers generated by its sample() method.


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