cdef extern from "gsl/gsl_fit.h":
int gsl_fit_linear ( double * x, size_t xstride,
double * y, size_t ystride,
size_t n,
double * c0, double * c1,
double * cov00, double * cov01, double * cov11,
double * sumsq)
int gsl_fit_wlinear ( double * x, size_t xstride,
double * w, size_t wstride,
double * y, size_t ystride,
size_t n, double * c0, double * c1,
double * cov00, double * cov01, double * cov11,
double * chisq)
int gsl_fit_linear_est ( double x, double c0, double c1,
double c00, double c01, double c11,
double *y, double *y_err)
int gsl_fit_mul ( double * x, size_t xstride,
double * y, size_t ystride,
size_t n, double * c1, double * cov11, double * sumsq)
int gsl_fit_wmul ( double * x, size_t xstride,
double * w, size_t wstride,
double * y, size_t ystride,
size_t n, double * c1, double * cov11, double * sumsq)
int gsl_fit_mul_est ( double x, double c1, double c11,
double *y, double *y_err)
int gsl_fit_poly ( double * x, double * w, double * y, size_t n,
double * c, size_t m, double * chisq)
int gsl_fit_fns ( double * A, double * w, double * y,
size_t n, double * c, size_t m, double * chisq)
int gsl_fit_linear_nd (double * m, double * y, double * w)
