MATLAB: Error bars added to column plot instead of regular line plot, and stacked 2×2

errorbarsplot

I would like to create a 2×2 plot with error bars, where each mean is represented by a column rather than by a marker (data point), something like this:
The errorbar function in Matlab seems to not have the option to make columns instead of simple markers, and also no option to stack the four entities as 2×2, instead giving me something that looks like this:

Best Answer

Would be worth a search on File Exchange to see if somebody has submitted a function, but--
It's somewhat of a pit(proverbial)a(ppendage) to do, but is achievable with bar and errorbar
A trivial sample --
>> y=randi(6,[2,2]);  % trivial dataset
y =
   1     2
   4     5
>> hB=bar(y);  % make a bar plot of y data
>> ylim([0 6]) % make y axes look better
>> hold on     % get ready to add errorbar on top of
>> barX=get(cell2mat(get(hB,'children')),'xdata');       % bar x-data (patches x locations)
>> barXpos=cell2mat(cellfun(@mean,barX,'uniform',0)).';  % return x position of midpoint of bars
>> arrayfun(@errorbar,barXpos,y,zeros(size(y)),0.1*y)    % add the error bar at top+10% range
>>
The above gives the following image--
Fix up the colors as desired and perhaps(?) a heavier line width, but shows the way to get the hard piece of data--where's the center of each bar drawn by bar? that's not a retrievable property; the above computes it as the average of the face positions.
Using arrayfun to invoke errorbar saves the drawing of the line between the points if used the array; that's also solvable by using linestyle but this seems pretty easy workaround to simply pass each element one-at-a-time. Do need an array of associated colors to match, of course...
Hope that helps...seems more trouble than should be, granted...
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