plotting multiple boxplots in the same figure window

I have 10 vectors of temperature data, all different lengths, that I want to make boxplots of and plot them all in the same figure window. How do I do this?

Answer 1

[Tom Lane]

Here's how to do that with three vectors of different lengths:

x1 = rand(10,1); x2 = 2*rand(15,1); x3 = randn(30,1);
x = [x1;x2;x3];
g = [ones(size(x1)); 2*ones(size(x2)); 3*ones(size(x3))];
boxplot(x,g)

[Karim Tarbali]

thanKs a lot

[Sayantan Sahu]

How do I plot the 5th and 95th percentile as whiskers ?

[Kristyna Herman]

How would I then label them as x1, x2, etc? Thanks!

[reuben roy]

It works!!! You're amazing Mr Tom Lane!

[Gabriel Apaza]

matlab's notation is so incredibly non user friendly it blows my mind

[Seth DeLand]

Just a note that as of R2020a this can also be accomplished using the boxchart function in MATLAB. boxplot is part of Statistics and Machine Learning Toolbox.

Answer 2

[Matt Learner]

A = [16 20 15 17 22 19 17]';

B = [22 15 16 16 16 18]';

C = [23 9 15 18 13 27 17 14 16 15 21 19 17]';

group = [ ones(size(A)); 2 * ones(size(B)); 3 * ones(size(C))];

figure

boxplot([A; B; C],group)

set(gca,'XTickLabel',{'A','B','C'})

[Silke Vos]

How can I change the color of A,B and C seperatly?

[Hélène Laura Valentina Zingone]

Did you find out how to do that? I'm still searching

[TESFALEM ALDADA]

@Matt Learner Thank you for your answer. I was having the same problem. For the above example they it has only three variables (A, B,C), but what will happen if it has 1000 variables, are we going to type all in the group?

I ask any robest way to do this for longer data.

[Peanut]

You would store the variables in a structure, where each field is a variable. Then you would loop through the fields, vertically concatenating each one.

e.g.

s.A = rand(10,1);
s.B = rand(15,1);
s.C = rand(20,1);

allData = [];
allCats = [];
allFields = string(fieldnames(s))
for iField = 1:length(allFields)
    allData = [allData;s.(allFields(iField))];
    allCats = [allCats,repelem(allFields(iField),length(s.(allFields(iField))));]
end
boxplot(allData,allCats)

Answer 3

[Akiva Gordon]

Are you familiar with the SUBPLOT function? This may be what you are looking for…

http://www.mathworks.com/help/matlab/ref/subplot.html