On 12/27/15 2:00 AM, Jony Cohen wrote:
Hi, Don't know if it's exactly what you're looking for but the MADLib package has utility function for matrix and vector operations. see: http://doc.madlib.net/latest/group__grp__array.html
Apply an operator to al elements on an array or pair of arrays: http://theplateisbad.blogspot.com/2015/12/the-arraymath-extension-vs-plpgsql.html, https://github.com/pramsey/pgsql-arraymath.
See also http://theplateisbad.blogspot.com/2015/12/more-fortran-90-like-vector-operations.html.
BTW, if you want to simply apply a function to all elements in an array there is an internal C function array_map that can do it. There's no SQL interface to it, but it shouldn't be hard to add one.
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