How to Plot Numbers on top of Bar graphs?

Assume we have this as data

Y=[198 138 172 188 190 192];
bar(Y);

How would I go about plotting the Y-values of each of the bars on top of the bars? So each bar would show its value on top of it.

Answer 1

[Chad Greene]

Use the text function like this:

Y=[198 138 172 188 190 192];
bar(Y);

text(1:length(Y),Y,num2str(Y'),'vert','bottom','horiz','center'); 
box off

[Ibro Tutic]

Nice answer! If we are working with grouped bar graphs i.e.

y = [2 2 3; 2 5 6; 2 8 9; 2 11 12];
bar(y)

Could this be applied in this case?

[alankrita asthana]

hi @chad greene. i am trying to use the same command to display the Y values on top of my bar graph. it isnt working. kindly help

[Chad Greene]

The phrase "it isn't working" does not contain enough information to help. I suggest reading this, then start another question with specifics about the issue you're having.

Answer 2

[Johannes Stoerkle]

As an extension, I found a good approach if one wants to plot the number on the top of bars, which are displayed in several groups. Therefore, I estimate the correction for the text x-Position using an exp-function, which is fitted to my empirical results.

For instance. If you consider 3 categories and 7 different models (determined in first line) it results:

dataSample = reshape([36 2:21],3,7)';
figure
catStrArray = {'category1','category2','category3'};
catArray = categorical(catStrArray);       
catArray = reordercats(catArray,catStrArray);
bar(catArray,dataSample')
nModel = size(dataSample,1);
nCat = size(dataSample,2);
xPosAmpl = 0.3682626-0.3298725*exp(-0.407004*(nModel-1)); % position amplitude
xPosInc = 2*xPosAmpl/(nModel-1);
modelNames = [];
for idxModel=1:nModel
    bar_xPos = 1:nCat;
    if nModel~=1
        bar_xPos = bar_xPos-xPosAmpl+(idxModel-1)*xPosInc;
    end
    text(bar_xPos,dataSample(idxModel,:),num2str(dataSample(idxModel,:)',...
        '%0.0f'),'vert','bottom','horiz','center'); 
    modelNames{idxModel}=sprintf('model%d',idxModel);
end
legend(modelNames)

Answer 3

[Soyeun Jung]

Hi Ibro, you can run this line of code to display the y-values on top of each bar. See the attached link for related information. https://ch.mathworks.com/matlabcentral/answers/40629-bar-plot-value-on-top

text([1:length(Y)], Y', num2str(Y','%0.2f'),'HorizontalAlignment','center','VerticalAlignment','bottom')