function engine = likelihood_weighting_inf_engine(bnet, varargin)% LIKELIHOOD_WEIGHTING_INF_ENGINE % engine = likelihood_weighting_inf_engine(bnet, ...)%% Optional arguments [defaults]% nsamples - [500]nsamples = 500;if nargin >= 2  args = varargin;  nargs = length(args);  for i=1:2:nargs    switch args{i},     case 'nsamples', nsamples= args{i+1};     otherwise,      error(['invalid argument name ' args{i}]);    end  endend   engine.nsamples = nsamples;engine.samples = [];engine.weights = [];engine = class(engine, 'likelihood_weighting_inf_engine', inf_engine(bnet));