scipy

Save / load scipy sparse csr_matrix in portable data format

by

How do you save/load a scipy sparse csr_matrix in a portable format? The scipy sparse matrix is created on Python 3 (Windows 64-bit) to run on Python 2 (Linux 64-bit). Initially, I used pickle (with protocol=2 and fix_imports=True) but this didn’t work going from Python 3.2.2 (Windows 64-bit) to Python 2.7.2 (Windows 32-bit) and got the error:

calling dot products and linear algebra operations in Cython?

by

I’m trying to use dot products, matrix inversion and other basic linear algebra operations that are available in numpy from Cython. Functions like numpy.linalg.inv (inversion), numpy.dot (dot product), X.t (transpose of matrix/array). There’s a large overhead to calling numpy.* from Cython functions and the rest of the function is written in Cython, so I’d like to avoid this.