For the astropy Table class (which wraps numpy structured arrays), I wrote functions that perform table joins and concatenate tables along rows or columns. These are reasonably full-featured and handle most of the common needs for these operations. The join function here addresses some limitations in the lib.recfunctions.join_by() function. You can see the documentation for the Table interface to these functions at [1].
The reason I'm writing is that the implementation is split into a pure numpy-based module (no astropy dependence [5]) and the astropy bit. Essentially all of the real work is done in the numpy-based module, so I'm wondering if the numpy project is interested in this code for inclusion into numpy. If so, I'd be happy to put together a pull request. I would just need direction on: - Where to put it - What function names to use - How to setup for included Cython code The Python and Cython code and tests can be see at [2], [3], [4]. The tests are currently based on astropy Tables, so these would be modified to use plain ndarray or masked arrays. Cheers, Tom [1]: http://astropy.readthedocs.org/en/latest/table/operations.html [2]: https://github.com/astropy/astropy/blob/master/astropy/table/np_utils.py [3]: https://github.com/astropy/astropy/blob/master/astropy/table/_np_utils.pyx [4]: https://github.com/astropy/astropy/blob/master/astropy/table/tests/test_operations.py [5]: There is a requirement for an OrderedDict which is currently provided by astropy for python 2.6. _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion