• Liam Healy's avatar
    GSL2 use new Jacobian function gsl_multifit_fdfsolver_jac · e6fad7a9
    Liam Healy authored
    Function #'jacobian calls GSL2 function gsl_multifit_fdfsolver_jac
    with a second optional argument, this argument is the matrix into
    which the jacobian is written. If it is NIL, than the matrix is
    created with the new function #'make-jacobian-matrix. Covariance
    calculation #'ls-covariance calls #'jacoabian as in GSL1, but needs to
    pass result to #'mpointer to get a C pointer. To avoid reallocating
    covariance matrix repeatedly, call #'make-jacobian-matrix outside the
    iteration loop and pass as argument to ls-covariance, as shown in
    example #'nonlinear-least-squares-example.
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