get_estimator_from_sim_data_mixed.m

function errors = get_estimator_from_sim_data_mixed(sim_data,derivative_nr)
%function errors = get_estimator_from_sim_data_mixed_relative(sim_data)
%
%function returning the error estimators of the soultion and its derivatives from sim_data
%
% derivative_nr indicates which derivative error should be returned. (0 for
% solution error)
%
% Markus Dihlmann 03.02.2011
%


if (nargin==1)||(isempty(derivative_nr))
    %returning the errors of solution and derivative solutions in a vector
    errors=[sim_data.Delta(end)];

    if isfield(sim_data,'Delta_der')
        for i=1:size(sim_data.Delta_der(:,1))
            errors = [errors, sim_data.Delta_der(i,end)];
        end
    end
    
else
    %returning only one error
    if derivative_nr == 0
        %return solution error
        errors = sim_data.Delta(end);
    else
        errors = sim_data.Delta_der(derivative_nr, end);
    end
end