24969 2014-03-07 13:02:03 +0000 Functions to support manipulation of matrices 2014-03-07 13:02:03 +0000 1 1 1 Unclassified XPath / XQuery / XSLT Requirements for Future Versions Working drafts All All NEW P2 normal --- 1 andrew_coleman jim.melton public-qt-comments oldest_to_newest 102060 0 andrew_coleman 2014-03-07 13:02:03 +0000 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