How can I add individual error bars to a grouped bar graph plot?

x1 = [2.5; 7.5];  
y = [y1PB y5PB; y2PB y6PB; y3PB y7PB; y4PB y8PB; y1RW y5RW; y3RW y7RW];

%error bars
errorplus = [0.000733045 0.000677482; 0.000782014 0.001159467; 0.001100796 0.000036955; 0.000698661 0.001299515; 0.000346841 0.001043998; 0.00040963 0.002191148];
errorneg = errorplus
figure; 
% Plot the bar graph
b = bar(x1, y, 'FaceColor', 'flat');
[nGroups,nBars] = size(y);
hold on
x = reshape([b.XEndPoints],[nGroups, nBars]);
errorbar(x,y,errorplus, errorneg,'k','linestyle','none');
hold off

Answer 1

[Voss]

Replace

x = reshape([b.XEndPoints],[nGroups, nBars]);

with

x = vertcat(b.XEndPoints);

Example, using random data:

x1 = [2.5; 7.5];  
% y = [y1PB y5PB; y2PB y6PB; y3PB y7PB; y4PB y8PB; y1RW y5RW; y3RW y7RW];
y = 0.035*rand(6,2);
%error bars
errorplus = [0.000733045 0.000677482; 0.000782014 0.001159467; 0.001100796 0.000036955; 0.000698661 0.001299515; 0.000346841 0.001043998; 0.00040963 0.002191148];
errorneg = errorplus;
figure; 
% Plot the bar graph
b = bar(x1, y, 'FaceColor', 'flat');
[nGroups,nBars] = size(y);
hold on
x = vertcat(b.XEndPoints);
errorbar(x,y,errorplus, errorneg,'k','linestyle','none');
hold off

[Emma Langelan]

Thank you very much, this was extremely helpful!

[Voss]

You're welcome!

By way of explanation:

b = struct('XEndPoints',{[1 2],[3 4],[5 6],[7 8],[9 10],[11 12]});

b.XEndPoints

ans = 1x2

1 2

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

ans = 1x2

3 4

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

ans = 1x2

5 6

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

ans = 1x2

7 8

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

ans = 1x2

9 10

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

ans = 1x2

11 12

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

x = reshape([b.XEndPoints],[6, 2])

x = 6x2

1 7 2 8 3 9 4 10 5 11 6 12

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

x = vertcat(b.XEndPoints)

x = 6x2

1 2 3 4 5 6 7 8 9 10 11 12

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>