The ability to specify that the "errorbar" function display the error bars inside the individual bars is not available in MATLAB. It displays errorbar at the center of each group.
To work around this issue, find the center of each bar and pass this data into "errorbar" with the respective error values.
ngroups = size(y, 1);
nbars = size(y, 2);
% Calculating the width for each bar group
groupwidth = min(0.8, nbars/(nbars + 1.5));
for i = 1:nbars
x = (1:ngroups) - groupwidth/2 + (2*i-1) * groupwidth / (2*nbars);
errorbar(x, y(:,i), err(:,i), '.');
end
hold off
