MATLAB Answers

Errorbar on Box and Whisker Plot

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Stuti Agrawal
Stuti Agrawal on 20 Jul 2021
Commented: Ive J on 23 Jul 2021
I am confused on how I can add error bars to my box and whisker plot:

Answers (1)

Ive J
Ive J on 22 Jul 2021
Edited: Ive J on 23 Jul 2021
If you want error bars on the same box plots, you can use something like this:
tab = table(randi([1, 50], 20, 1), repmat([1; 2], 10, 1), 'VariableNames', {'value', 'group'}); % sample data with 2 groups: 1 and 2
hold on
boxchart(, tab.value)
% update the boxchart with data points + errorbars
for i = 1:2
y = tab.value( == i);
x = ones(sum( == i), 1).*i;
plot(x, y, 'o', 'MarkerFaceColor', 'r') % first show data points
errorbar(i, mean(y), mean(y)+std(y), 'Marker', 'o', 'MarkerFaceColor', 'k', 'Color', 'k') % then show error around the mean value only
Ive J
Ive J on 23 Jul 2021
So take a look at my edited snippet. Error in this case is only shown around the mean.

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