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[Bug 24969] New: Functions to support manipulation of matrices

From: <bugzilla@jessica.w3.org>
Date: Fri, 07 Mar 2014 13:02:03 +0000
To: public-qt-comments@w3.org
Message-ID: <bug-24969-523@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=24969

            Bug ID: 24969
           Summary: Functions to support manipulation of matrices
           Product: XPath / XQuery / XSLT
           Version: Working drafts
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Requirements for Future Versions
          Assignee: jim.melton@acm.org
          Reporter: andrew_coleman@uk.ibm.com
        QA Contact: public-qt-comments@w3.org

XPath/XQuery 3.0 added support for arrays, including functions to create and
manipulate them.  A future version should consider adding functions to support
matrix operations.

Typical operations would be:
- creating n x m matrix (2-dimensional array)
- submatrix (splitting)
- transpose
- matrix addition
- matric multiplication
- scalar operations (addition/subtraction/multiplication etc of each entry)

A few use cases:
- representing graphs (edges, adjacency etc)
- computer graphics (4x4 transformation matrix representing translation,
rotation, scaling, perspective/orthogonal projection)
- data structures for probability and statistics
- linear algebra

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Received on Friday, 7 March 2014 13:02:04 UTC

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