% Make a bar chart

results  = [  5,   3,   2,   6];
sterrors = [0.5, 0.2, 0.1, 0.8];

% there's often a one-line command that does most of what you want ...
bar(results);
clf;

% ... but getting the figure exactly right takes a bit more work
xvals = [1,2,4,5];
xtick = [1.5, 4.5];
xlabels =      {'Factor A1', 'Factor A2'};
legendlabels = {'Factor B1', 'Factor B2'};
bfactors = [1,2,1,2];
barcolors = {'b', 'r'};

hold on 
for i = 1:length(results)
  h(i) = bar(xvals(i), results(i));   
  set(h(i), 'facecolor', barcolors{bfactors(i)});
  he(i) = errorbar(xvals(i), results(i), sterrors(i), barcolors{bfactors(i)}); 
end

results  = [  5,   3,   2,   6];
sterrors = [0.5, 0.2, 0.1, 0.8]
set(gca, 'xtick', xtick);
set(gca, 'xticklabel', xlabels);
% add a legend
legend(h(1:2), legendlabels, 'location', 'northeastoutside');
% label y axis
ylabel('score');