How to use 'numpy combine arrays into matrix' in Python
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1298 def concatenate_arrays(arrays): 1299 # concatenate data 1300 if all([type(array) is np.ndarray for array in arrays]): 1301 concatenation = np.concatenate(arrays) 1302 # if sparse, cast all to sparse and stack 1303 else: 1304 concatenation = sp_sparse.vstack( 1305 [ 1306 array 1307 if isinstance(array, sp_sparse.csr_matrix) 1308 else sp_sparse.csr_matrix(array) 1309 for array in arrays 1310 ] 1311 ) 1312 return concatenation