You need the XEndPonits property of the bars.
% Sample data
data = [1.5, 2.3, 3.2; 2.0, 2.8, 3.5; 1.8, 2.5, 3.0];
errors = [0.2, 0.3, 0.4; 0.3, 0.2, 0.3; 0.2, 0.3, 0.2];
% Number of groups and number of bars in each group
[numGroups, numBars] = size(data);
% Plot the grouped bar chart
figure;
hold on;
hBar = bar(data);
% Get the x positions of the bars
xBar = nan(numGroups, numBars);
for i = 1:numBars
xBar(:, i) = hBar(i).XEndPoints;
end
% Plot the error bars
for i = 1:numGroups
for j = 1:numBars
errorbar(xBar(i, j), data(i, j), errors(i, j), 'k', 'linestyle', 'none', 'CapSize', 10);
end
end
% Labels and title
xlabel('Group');
ylabel('Value');
title('Grouped Bar Chart with Error Bars');
legend('Bar 1', 'Bar 2', 'Bar 3');
hold off;
