the main work horse of the NumCpp library.">NdArray</a> of the current values of the fit parameters </td></tr>
    <tr><td class="paramname">derivatives</td><td>array of std::functions to calculate the function derivatives. The function that is being fit. The function takes as inputs an <a class="el" href="classnc_1_1_nd_array.html" title="Holds 1D and 2D arrays, the main work horse of the NumCpp library.">NdArray</a> of a single set of the coordinate values, and an <a class="el" href="classnc_1_1_nd_array.