python Programming Glossary: csr

http://stackoverflow.com/questions/11863775/python-scipy-install-on-ubuntu

0.11.0rc1 scipy sparse __init__.py line 180 in module from csr import File home michael Downloads scipy 0.11.0rc1 scipy sparse.. File home michael Downloads scipy 0.11.0rc1 scipy sparse csr.py line 12 in module from sparsetools import csr_tocsc csr_tobsr.. sparse csr.py line 12 in module from sparsetools import csr_tocsc csr_tobsr csr_count_blocks File home michael Downloads..

Efficient slicing of matrices using matrix multiplication, with Python, NumPy, SciPy

http://stackoverflow.com/questions/14477448/efficient-slicing-of-matrices-using-matrix-multiplication-with-python-numpy-s

Python NumPy SciPy I want to reshape a 2d scipy.sparse.csr.csr_matrix let us call it A to a 2d numpy.ndarray let us call.. NumPy SciPy I want to reshape a 2d scipy.sparse.csr.csr_matrix let us call it A to a 2d numpy.ndarray let us call this.. when the slicer is created as a ndarray multiplied by the csr matrix and slice the result . OBS using a coo sparse for matrix..

Scipy sparse… arrays?

http://stackoverflow.com/questions/2540059/scipy-sparse-arrays

format that is row or column based csc_matrix and csr_matrix . These use efficient C implementations under the hood.. n 2 .astype int .astype float # 50 sparse vector x_csr scipy.sparse.csr_matrix x x_dok scipy.sparse.dok_matrix x.reshape.. int .astype float # 50 sparse vector x_csr scipy.sparse.csr_matrix x x_dok scipy.sparse.dok_matrix x.reshape x_csr.shape..

Is it possible to specify your own distance function using Scikits.Learn K-Means Clustering?

http://stackoverflow.com/questions/5529625/is-it-possible-to-specify-your-own-distance-function-using-scikits-learn-k-means

from scipy.sparse import issparse # scipy sparse csr.py __date__ 2011 11 17 Nov denis # X sparse any cdist metric.. x Y cdist array any cdist metric X or Y may be sparse best csr # todense row at a time v slow if both v sparse sxy 2 issparse.. X n random.sample of the rows of X X may be sparse best csr sampleix random.sample xrange X.shape 0 int n return X sampleix..