Drawing fancy box plots

Hi

is it possible to draw boxplots same as what i attached, in matlab? I have tried toolbox provided here : https://github.com/IoSR-Surrey/MatlabToolbox, but it does not seem to be able to do this. Does anyone has any suggestion?

Thanks in advance.

Answer 1

[Adam Danz]

Here are examples using boxchart (requires Matlab r2020a) and boxplot with slightly different outcomes.

rng('default')
x = -pearsrnd(0,1,1,4,1000,8);
figure()
axes()
hold on
% Loop through each box in order to control color
for i = 1:size(x,2)
    boxchart(repmat(i,size(x,1),1),x(:,i),'Orientation','horizontal');
end
legend(num2cell(char(double(64+(1:size(x,2))))),'Location','BestOutside')
box on

Demo using boxplot

boxplot() also has an orientation option but it does not fill the color of the boxplots (unless 'compact' style is used) and does not have a legend option.

rng('default')
x = -pearsrnd(0,1,1,4,1000,8);
figure()
group = (1:width(x)).*ones(height(x),1);
boxplot(x(:),group(:),'Orientation','horizontal',...
    'ColorGroup',group(:),'Symbol','o','OutlierSize',4,...
    'Color',lines(width(x)));

[omid zandi]

Thanks to the moon and back, but unfortunately my matlab version is 2018b and boxchart function does not seem to be available in my version :( . Is it possible to modify it, so that; i can run it in 2018b?

[Adam Danz]

I added another example to my answer using boxplot which existed long before boxchart but it doesn't have options to fill the boxplots nor does it easily support a legend.

[Adam Danz]

Old version of example1

I'm storing this here for my own reference. It demonstrates some bugs in r2021a when using grouped data and horizontal orientation. Use the code from my answer above and ignore this.

Note: this has been fixed in R2021b.

Problem:

1. XRuler and YRuler and not switched
2. XRuler is categorical desipte using numeric inputs.
3. XAxis limit isn't adjusted (axis tight fixes it)

rng('default')
x = -pearsrnd(0,1,1,4,1000,8);
groups = (1:size(x,2)) .* ones(size(x));
figure()
boxchart(x(:),'GroupByColor',groups(:),'Orientation','horizontal');
% axis tight % This fixes the xlim problem
legend(num2cell(char(double(64+(1:size(x,2))))),'Location','BestOutside')