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: calcError.m
    path of file: ./repos/mtex/SO3Fun/@SO3Fun
    
    the code of the file until where you have to start completion: function e = calcError(odf1,odf2,varargin)
% calculate approximation error between two ODFs
%
% Syntax
%   e = calcError(odf1,odf2)
%   e = calcError(odf,pf,'RP')
%
% Input
%  odf1, odf2 - @SO3Fun
%  pf   - @PoleFigure
%  S3G  - @SO3Grid of quadrature nodes (optional)
%
% Options
%  L0 - measure of the orientation space where $|odf1 -- odf2|>\epsilon|
%  L1 - L^1 error 
%  L2 - L^2 error
%  RP - RP  error (default)
%  resolution - resolution used for calculation of the error
%
% See also

    
function e = calcError(odf1,odf2,varargin)
% calculate approximation error between two ODFs
%
% Syntax
%   e = calcError(odf1,odf2)
%   e = calcError(odf,pf,'RP')
%
% Input
%  odf1, odf2 - @SO3Fun
%  pf   - @PoleFigure
%  S3G  - @SO3Grid of quadrature nodes (optional)
%
% Options
%  L0 - measure of the orientation space where $|odf1 -- odf2|>\epsilon|
%  L1 - L^1 error 
%  L2 - L^2 error
%  RP - RP  error (default)
%  resolution - resolution used for calculation of the error
%
% See also
% PoleFigure/calcODF PoleFigure/calcError 

% compare with a pole figure
if isa(odf2,'PoleFigure'), e = calcError(odf2,odf1,varargin{:}); return;end