Help with centralling text values above a Bar Chart with side by side data

Hello, I am plottign a barchart from data from a uitable. I have 2 ydata sets that I plot next to each other as below.

I am wanting to display the values on each column bar and I have almost done it. But they are not quite central with respect to the bars. Here is my code:

    %Get data from UITABLE
    data=get(handles.uitable3,'data');
    Y=cell2mat(data(:,4));
    X=data(:,2);
    %Prepare for catergorical X data
    Xdata = categorical(X);
    X = reordercats(Xdata,X);
    axes(handles.axes2);cla reset
    
    %Combine Y data and create bar chart
    Y1=cell2mat(data(:,3));
    bpcombined = [Y, Y1];
    hb = bar(X, bpcombined, 'grouped');
    legend({'400-800nm','FilterBand'},'Location','northoutside','FontSize',10,'NumColumns',2)
    
    %Add text to top of barcharts
    for i1=1:numel(Y1)
        text(X(i1),Y1(i1),num2str(Y1(i1),'%0.0f'),...
                   'HorizontalAlignment','left',...
                   'VerticalAlignment','bottom','Color','w')

            text(X(i1),Y(i1),num2str(Y(i1),'%0.0f'),...
                   'HorizontalAlignment','right',...
                   'VerticalAlignment','bottom','Color','w')       
    end
    
    %Sometimes the txt is off the plot so resize the ylims (Maybe there is a better way to do this!)
    if max(ylim)>=Y(end)
     ylim([0 1.10*Y(end)])
    end

    
    %Add the axtoolbar (This isn't working for some reason)
    ax=gca;
    axtoolbar(ax,{'export','restoreview','zoomout','zoomin'});
    axtoolbar(ax,'Visible','on')
    drawnow;

[Jason]

Anyone?

Answer 1

[Rik]

Find the x position of the bar itself and use that in your call to text. Then you can set the HorizontalAlignment to center.

[Jason]

I have tried this:

hb(1).XData %hb is my barchart handle

But it just returns an array of the catergories

ans = 

  1×3 categorical array

     405nm_1      405nm_2      405nm_3 

Jason

[Jason]

OK I think with Rik's suggestion I have worked it out.

When you plot catergorical data X is actually plots at locations x=1,2,3 etc.

Its the offset between groups that we need:

offset=hb(1).XOffset %hb is mt barchart handle

So I can loop through my catergorical data (X(i))

but put the x coordiante intext to be i + offset

Jason

[Rik]

Glad to have been of help. Sorry for my slow response, I'm a bit busy today. Good to see you solved it.