Automatically position annotation on bar graph

Gunny — Thu, 18 Jun 2009 20:15:04 -0400

I could to with some help.
I have created a function which creates a number of subplots based on a user selection.
The subplots are bar graphs.
The y axis is normalised data.
The x-axis is is the observations.
I would like to place a text box with the absolute vaue on top of each bar graph.

Because the bar gaphs are varying height I don't know how to calculate the position of the textbox. Once the position is calculate how do code the reference to the absolute value to put in the text box?
Below is the code to generate the subplots.

for i=1:NPlotsWanted

    subplot(x,y,i),bar(cell2mat(store(2:end-1,ave_index(i)+1)));
    xlabel('Month','fontsize',8);
    ylabel('Normalised DTC count per month','fontsize',8);
    axis([0 noOfDatas+1 0 0.05]);
    legend(store(1,ave_index(i)+1),'location','NorthOutside','FontSize',8);
    set(gca,'XTickLabel', months); % labels Xticks with months.

end

Thanks, Gunny

Re: Automatically position annotation on bar graph

vedenev — Fri, 19 Jun 2009 08:56:44 -0400

Use text function. Aslo you can get bar object hendle. See example:

h=bar([1 2 3]);
x=get(h,'Xdata');
y=get(h,'Ydata');
for xc=1:length(x)
text(x,y+0.2,['y=' num2str(y)]);
end

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Automatically position annotation on bar graph

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