24 lines
638 B
Cython
24 lines
638 B
Cython
"""Efficient (dense) parameter vector implementation for linear models. """
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cimport numpy as np
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cdef extern from "math.h":
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cdef extern double sqrt(double x)
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cdef class WeightVector(object):
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cdef np.ndarray w
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cdef double *w_data_ptr
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cdef double wscale
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cdef int n_features
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cdef double sq_norm
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cdef void add(self, double *x_data_ptr, int *x_ind_ptr,
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int xnnz, double c) nogil
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cdef double dot(self, double *x_data_ptr, int *x_ind_ptr,
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int xnnz) nogil
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cdef void scale(self, double c) nogil
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cdef void reset_wscale(self) nogil
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cdef double norm(self) nogil
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