commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Rodion Efremov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COLLECTIONS-479) An Order Statistic Tree
Date Fri, 20 Dec 2013 17:00:17 GMT

    [ https://issues.apache.org/jira/browse/COLLECTIONS-479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13854155#comment-13854155
] 

Rodion Efremov commented on COLLECTIONS-479:
--------------------------------------------

Hello, y'all!

Might the ordered statistic tree look anything like [this|https://github.com/coderodde/cskit/blob/master/src/main/java/net/coderodde/cskit/ds/tree/OrderStatisticTree.java]?

Rodde

> An Order Statistic Tree
> -----------------------
>
>                 Key: COLLECTIONS-479
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-479
>             Project: Commons Collections
>          Issue Type: New Feature
>            Reporter: Ajo Fod
>            Priority: Minor
>         Attachments: NodeExistsException.java, RedBlackBST.java
>
>
> An order statistic tree http://en.wikipedia.org/wiki/Order_statistic_tree provides two
useful properties. The ability to rank arbitrary keys relative to keys existing in the tree
AND the ability to retrieve elements from the tree with the given rank.
> This can be used to find the percentile rank of a key for example.
> This functionality is not yet provided yet by any of the major libraries AFAIK.



--
This message was sent by Atlassian JIRA
(v6.1.4#6159)

Mime
View raw message