Probably the easiest way is to emulate what Python is doing in M[i,:] and M[:,i]. You can create the : with PySlice_New(NULL, NULL, NULL), and the i with PyInt_FromLong. Then create a tuple with Py_BuildValue and use PyObject_GetItem to do the slicing.
is there a C-API function for numpy which implements Python's
multidimensional indexing? Say, I have a 2d-array
PyArrayObject * M;
and an index
how do I extract the i-th row or column M[i,:] respectively M[:,i]?
I am looking for a function which gives again a PyArrayObject * and
which is a view to M (no copied data; the result should be another
PyArrayObject whose data and strides points to the correct memory
portion of M).
I searched the API documentation, Google and mailing lists for quite a
long time but didn't find anything. Can you help me?
NumPy-Discussion mailing list