Bar chart with double Y axis and error bars

I have bar chart with two Y axes and I want to add error bars to the graph. This is my code (works perfectly w/o error bars but I am not sure how to add them):

g = figure
subplot(1,2,1)
a = [HINT_av zeros(1,4)];
b = [zeros(1,4) DANTALE_av];
    
    [AX,H1,H2] = plotyy([1:8],a, [1:8],b, 'bar', 'bar');
    set(H1,'FaceColor','r') 
    set(H2,'FaceColor','b')
    xt = get(gca, 'Xtick');
    set(gca, 'Xtick', xt, 'XTickLabel', {'F1', 'F4', 'F5', 'F7', 'F1', 'F4', 'F5', 'F7'})
    legend('HINT','DANTALE')
    grid minor
    title('Average speech test results')
    

Answer 1

[Star Strider]

See: Bar Plot With Error Bar (link) for an example.

We cannot run your code, so we cannot give a specific example with respect to it.

[KDRA]

These are my variables:

HINT_av = [0.325 -0.29 -0.35 -0.35];

DANTALE_av = [73.93 73.34 74.4 73.8]

And these are standard deviations:

HINT_sd = [1.35262091264823 1.01044544632553 1.37133349538161 1.22497165500086];

DANTALE_sd = [6.73119603042431 10.1497892698431 5.68174464598878 6.02716074670874]

that should be enough?

[Star Strider]

I can get this to work for ‘HINT’ only. The reason is that MATLAB deletes the second Axes object (‘AX(2)’) and the associated Bar object before or in the for loop, and I can’t figure out how to prevent that.

Your posted code with my additions:

HINT_av = [0.325 -0.29 -0.35	-0.35];
DANTALE_av = [73.93 73.34 74.4 73.8];
HINT_sd = [1.35262091264823 1.01044544632553 1.37133349538161 1.22497165500086];
DANTALE_sd = [6.73119603042431 10.1497892698431 5.68174464598878 6.02716074670874];

g = figure;
% subplot(1,2,1)
a = [HINT_av zeros(1,4)];
b = [zeros(1,4) DANTALE_av];
    
    [AX,H1,H2] = plotyy([1:8],a, [1:8],b, 'bar', 'bar');
    hold all
    set(H1,'FaceColor','r') 
    set(H2,'FaceColor','b')
    xt = get(gca, 'Xtick');
    set(gca, 'Xtick', xt, 'XTickLabel', {'F1', 'F4', 'F5', 'F7', 'F1', 'F4', 'F5', 'F7'})
    legend('HINT','DANTALE', 'Location','NortheastOutside')
    grid minor
    title('Average speech test results')
    AX(1).YLim = [-3 3];
    AX(2).YLim = [0 85];

hBar = [H1; H2]
sd_mtx = [HINT_sd; DANTALE_sd];
for k1 = 1:size(AX,2)
    ctr(k1,:) = bsxfun(@plus, hBar(k1).XData, hBar(k1).XOffset');       % Note: ‘XOffset’ Is An Undocumented Feature, This Selects The ‘bar’ Centres
    ydt(k1,:) = hBar(k1).YData;                                         % Individual Bar Heights
    YLI = ydt(k1,:) ~= 0;                                               % Logical Mask To Create Equal Vectors
    xv = ctr(k1,YLI);
    yv = ydt(k1,YLI);
    err = sd_mtx(k1,:);
    errorbar(AX(k1), xv, yv, err, '.r')                                 % Plot Error Bars
end
hold off

Anyway, I gave it my best effort, and half of it works. I am going to report ehe axes deletion as a bug. It may not exist in the newer yyaxis (link) function (I didn’t try it), and since you didn’t use it, you may not have it, so I didn’t change your code.

[KDRA]

Hi there!

thanks for your effort:)

I actually did try the yyaxis at first but I didn't know how to plot bar charts with this (I managed to do it for line plots).

So if you may, it would be great if you could give me some tips to make it working! Thanks in advance!