Hi > Indeed, the solution is as simple as this ;) The trouble is to find > the information! > Yes, there is so much information everywhere. And it's hard to make the first steps. >>>> For the std::vector<>[], I suggest you convert it to a single vector, >>>> as the data inside this "array" is not contiguous and it can thus be >>>> cumbersome to create a Numpy array from that. >>>> I am now ready to do this. To be certain, 'contiguous' means that the std::vector<>'s are not the same length, right? Would that mean that I'd better use a tuple of lists or so? (or list of lists or so).
thanks for your time Raymond >>>> Once the structure is prepared, you have to allocate the dimensions, >>>> but this may be available online. >>>> >>>> In case you know that the C++ data won't go away before the Python >>>> array, you can always wrap the container >>>> (http://matt.eifelle.com/2008/11/04/exposing-an-array-interface-with-swig-for-a-cc-structure/) >>>> with SWIG. >>>> >>>> Matthieu >>>> >>>> 2009/7/30 Raymond de Vries <[email protected]>: >>>> >>>> >>>> >>>>> Hi everyone, >>>>> >>>>> (I sent this message yesterday as well but somehow it didn't come >>>>> through...) >>>>> >>>>> I would like to ask your advice how I can use NumPy to wrap my existing >>>>> C++ library with 2-dimensional arrays. I am wrapping the library with >>>>> swig and I have the typemap function declaration. But now I am >>>>> struggling a lot to find an implementation for getting access to the >>>>> 2-dimensional arrays in my C++ classes. I have wrapped most of the >>>>> library but the multi-dimensional arrays are problematic. From what I >>>>> have read, I can use NumPy for this.. >>>>> >>>>> There is so much information about NumPy, Numeric etc that it is not >>>>> clear anymore which example I can use best. It's clear that NumPy is >>>>> probably the way to go. >>>>> >>>>> This is a small example of the class that I would like to wrap: >>>>> struct MyClass { >>>>> float array1[2][2]; >>>>> std::vector<float> array2[2]; >>>>> }; >>>>> >>>>> I've also read that I need to call import_array() but where should I put >>>>> this? >>>>> >>>>> Is there a small example with NumPy c-api to wrap/convert my >>>>> 2-dimensional arrays to python? >>>>> >>>>> Thanks a lot already >>>>> Raymond >>>>> _______________________________________________ >>>>> NumPy-Discussion mailing list >>>>> [email protected] >>>>> http://mail.scipy.org/mailman/listinfo/numpy-discussion >>>>> >>>>> >>>>> >>>>> >>>> >>>> >>> _______________________________________________ >>> NumPy-Discussion mailing list >>> [email protected] >>> http://mail.scipy.org/mailman/listinfo/numpy-discussion >>> >>> >>> >> _______________________________________________ >> NumPy-Discussion mailing list >> [email protected] >> http://mail.scipy.org/mailman/listinfo/numpy-discussion >> >> > > > > _______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
