Effacer les filtres
Effacer les filtres

How to plot box plots of data of different sizes on the same figure?

107 vues (au cours des 30 derniers jours)
Yazan
Yazan le 13 Juil 2021
Commenté : Yazan le 15 Juil 2021
Hi everyone!
I have vectors of variable sizes in a cell array. I need to plot the box plot of each vector on the same figure. The Matlab function boxplot accepts only a matrix as an input, meaning that I cannot plot all the boxes together by passing a cell array. Also, it doesn't work if I hold the axes and plot the boxes one by one at different positions. A simple code is below to help you understand the issue.
x1 = randn(128, 1);
x2 = randn(100, 1);
figure
boxplot(x1, 'Positions', 1);
hold on
boxplot(x2, 'Positions', 2);
% only one box is shown

Réponse acceptée

Ive J
Ive J le 13 Juil 2021
Modifié(e) : Ive J le 13 Juil 2021
You just need to define a grouping array:
x1 = randn(128, 1);
x2 = randn(100, 1);
X = [x1; x2];
grp = [ones(size(x1)); 2.*ones(size(x2))];
boxplot(X, grp)
  5 commentaires
Ive J
Ive J le 14 Juil 2021
After checking again the boxplot behavior, I guess there is a workaround to avoid this grouping:
x1 = randn(128, 1);
x2 = randn(100, 1);
ax = gca;
hold on
boxplot(ax, x1, 'Position', 1)
boxplot(ax, x2, 'Position', 2)
hold off
% modify XLim and YLim so that the axis covers both datasets.
ax.XLim = [0.5, 2.5]; % Make sure that ax XLim covers both
YLimCoeff = 1.1;
ax.YLim = [YLimCoeff*min([x1(:); x2(:)]), YLimCoeff*max([x1(:); x2(:)])]; % so, even if x1 and x2 come from different sources, by now, both are available
% modify XTick: current axis only has the tick value for the second boxplot
ax.XTick = [1, 2];
ax.XTickLabel = string(ax.XTick);
Yazan
Yazan le 15 Juil 2021
Great! Many thanks!

Connectez-vous pour commenter.

Plus de réponses (0)

Produits


Version

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by