You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: sphsplint.m
    path of file: ./repos/fieldtrip/private
    
    the code of the file until where you have to start completion: function [WVo, WLo] = sphsplint(elc1, elc2, order, degree, lambda)

% SPHSPLINT computes the spherical spline interpolation and the surface
% laplacian of an EEG potential distribution
% 
% Use as
%   [WVo, WLo] = sphsplint(elc1, elc2)
%   [WVo, WLo] = sphsplint(elc1, elc2, order, degree, lambda)
% where
%   elc1    electrode positions where potential is known
%   elc2    electrode positions where potential is not known
% and

    
function [WVo, WLo] = sphsplint(elc1, elc2, order, degree, lambda)

% SPHSPLINT computes the spherical spline interpolation and the surface
% laplacian of an EEG potential distribution
% 
% Use as
%   [WVo, WLo] = sphsplint(elc1, elc2)
%   [WVo, WLo] = sphsplint(elc1, elc2, order, degree, lambda)
% where
%   elc1    electrode positions where potential is known
%   elc2    electrode positions where potential is not known
% and
%   WVo     filter for the potential at electrode locations in elc2
%   WLo     filter for the laplacian at electrode locations in elc2
%   order   order of splines
%   degree  degree of Legend