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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (MATH-1244) Add "cosAngle" method in "MathArrays"
Date Fri, 14 Aug 2015 14:27:46 GMT

    [ https://issues.apache.org/jira/browse/MATH-1244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14614947#comment-14614947
] 

Gilles edited comment on MATH-1244 at 8/14/15 2:27 PM:
-------------------------------------------------------

commit ed6c47dd9ebbb2e38fb3e17a2b961f0fcf0e6df3 (4.0)
commit 8e049a0ef028ffa332aa147893f702c310e01ce0 (3.6)


was (Author: erans):
commit ed6c47dd9ebbb2e38fb3e17a2b961f0fcf0e6df3

> Add "cosAngle" method in "MathArrays"
> -------------------------------------
>
>                 Key: MATH-1244
>                 URL: https://issues.apache.org/jira/browse/MATH-1244
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Gilles
>            Assignee: Gilles
>            Priority: Trivial
>             Fix For: 4.0
>
>
> Similar to other utilities (e.g. "distance") that interprets a Java array as Cartesian
coordinates, I propose to add the function that calculates the cosine of the angle between
two vectors:
> {code}
> public static double cosAngle(double[] v1, double[] v2) {
>     return linearCombination(v1, v2) / (safeNorm(v1) * safeNorm(v2));
> {code}



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