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

[Benjamin Kraus]

Starting in MATLAB R2024b, Bar labels are now a built-in feature

Starting in MATLAB R2024b, Bar objects now have a Labels property that can be used to add labels to the tops of your bars. You can read about the new properties on the Bar objects property page.

For example:

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

Solution for MATLAB R2019b through R2024a

If you can't upgrade to MATLAB R2024b just yet, you can use the XEndPoints and YEndPoints properties that were added in R2019b.

Y=[198 138 172 188 190 192];
b = bar(Y);
text(b.XEndPoints, b.YEndPoints, string(Y), ...
    VerticalAlignment='bottom', HorizontalAlignment='center')

Answer 4

[Edgar Mauricio Ocampo Alvarez]

% this is the best solution:

xtips1 = bar(1).XEndPoints; ytips1 = bar(1).YEndPoints;

text(xtips1, ytips1, num2str(Y1,'%0.2f'),'HorizontalAlignment','left','VerticalAlignment','middle','Rotation',90,'FontSize',8);

xtips2 = bar(2).XEndPoints; ytips2 = bar(2).YEndPoints;

text(xtips2, ytips2, num2str(Y2,'%0.2f'),'HorizontalAlignment','left','VerticalAlignment','middle','Rotation',90,'FontSize',8);

Answer 5

[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')

Answer 6

[Daniela Maria]

promedios = groupsummary(middle, 'Group', 'mean', {'IAAScore', 'MOScore'});

promedio_IAA = promedios.mean_IAAScore;

promedio_MO = promedios.mean_MOScore;

grupos = promedios.Group;

figure;

barras = bar(grupos, [promedio_IAA, promedio_MO]);

% Ajustar las etiquetas del eje x

xticklabels(grupos);

angle(45);

% Ajustar la orientación horizontal de las leyendas del eje x

ax = gca;

ax.XTickLabelRotation = 0;

% Cambiar el relleno de las barras a un gris más claro y el color del borde

color_relleno = [0.8, 0.8, 0.8]; % Gris claro

color_borde_IAA = 'red'; % Color del borde de IAAScore

color_borde_MO = '#4DBEEE'; % Color del borde de MOScore

ancho_borde = 1.5; % Ancho del borde de las barras

for i = 1:numel(barras)

barras(i).FaceColor = color_relleno;

if i == 1

barras(i).EdgeColor = color_borde_IAA;

else

barras(i).EdgeColor = color_borde_MO;

end

barras(i).LineWidth = ancho_borde;

promedios = groupsummary(middle, 'Group', 'mean', {'IAAScore', 'MOScore'});

promedio_IAA = promedios.mean_IAAScore;

promedio_MO = promedios.mean_MOScore;

grupos = promedios.Group;

figure;

barras = bar(grupos, [promedio_IAA, promedio_MO]);

% Ajustar las etiquetas del eje x

xticklabels(grupos);

xtickangle(45);

% Ajustar la orientación horizontal de las leyendas del eje x

ax = gca;

ax.XTickLabelRotation = 0;

% Cambiar el relleno de las barras a un gris más claro y el color del borde

color_relleno = [0.8, 0.8, 0.8]; % Gris claro

color_borde_IAA = 'red'; % Color del borde de IAAScore

color_borde_MO = '#4DBEEE'; % Color del borde de MOScore

ancho_borde = 1.5; % Ancho del borde de las barras

for i = 1:numel(barras)

barras(i).FaceColor = color_relleno;

if i == 1

barras(i).EdgeColor = color_borde_IAA;

else

barras(i).EdgeColor = color_borde_MO;

end

barras(i).LineWidth = ancho_borde;

end

% Añadir etiquetas y título

xlabel('Group');

ylabel('Stinging Frequency');

% Crear la leyenda sin recuadro

legend('IAA', 'MO', 'Box', 'off');

% Obtener el número de observaciones por valor único en la columna 'MOScore' y 'Group'

num_observaciones_MO = groupcounts(middle, {'Group', 'MOScore'});

% Obtener los valores únicos en la columna 'MOScore'

valores_MO = unique(middle.MOScore);

% Agregar el número de observaciones a las barras de MO

for i = 1:numel(barras)

if strcmp(grupos(i), 'MO')

% Obtener las coordenadas x y y de la barra actual

x = barras(i).XData + barras(i).XOffset;

y = barras(i).YData;

% Calcula la posición para colocar la etiqueta

x_pos = x;

y_pos = y + 0.05 * max(y); % Ajusta la posición vertical

% Obtener el número de observaciones para el valor de 'MOScore' correspondiente

num_observaciones = num_observaciones_MO(num_observaciones_MO.Group == grupos(i) & ismember(num_observaciones_MO.MOScore, valores_MO(i)), 3);

% Añadir la etiqueta a la barra actual en color negro y con un tamaño de fuente mayor

text(x_pos, y_pos, num2str(num_observaciones), 'HorizontalAlignment', 'center', 'VerticalAlignment', 'bottom', 'Color', 'k', 'FontSize', 10);

end

end

I'm trying with this codde, but the value doesn't appear and no error