Grouped boxplot with different lengths

Hello:

I want to plot grouped boxplot in a single figure. My cell array contains foll mxn matrices.:

G1: 108x2

G2: 293x2

G3: 30x2

Each of these Gs' are different groups for which I need to plot 6 boxplot for these 3 sub-groups. Any help?

Answer 1

[Adam Danz]

You can vertically contatenate all of you data into a single column and use a [n x 2] grouping variable 'group' where group(:,1) identifies the G1, G2, G3 groups and group(:,2) identifies the column1 and column2 groups. Note that these groupings are also indicated in the x tick labels.

G1 = rand(108,2)-.5+[0,1]; 
G2 = rand(293,2)-.5+[2,4];
G3 = rand(30,2)-.5+[3,6]; 

group = [repelem([1;2;3],[numel(G1),numel(G2),numel(G3)]), ...
    [repelem([1;2],size(G1,1));repelem([1;2],size(G2,1));repelem([1;2],size(G3,1))]]; 

boxplot([G1(:);G2(:);G3(:)],group)

[Poulomi Ganguli]

Thanks! Any ways, if I want to set up greek fonts at the bottom like alpha, beta etc as x-axes labels...?

[Adam Danz]

Tip 1: x ticklabels with greek letters

https://www.mathworks.com/help/stats/boxplot.html#bu180jd-Labels

boxplot(. . ., 'Labels',{'a' '\alpha' 'b' '\beta' 'g' '\gamma'})
axh = gca(); 
axh.XAxis.TickLabelInterpreter='tex';

Tip 2: add space between groups

https://www.mathworks.com/help/stats/boxplot.html#bu180jd-FactorGap

boxplot(. . .,'FactorGap',[40,1])

Tip 3: add a divider line between groups

https://www.mathworks.com/help/stats/boxplot.html#bu180jd-FactorSeparator

boxplot(. . .,'factorSeparator',1)

Tip 4: include greek letter in x axis label

xlabel('greek letter \alpha')

[Poulomi Ganguli]

Thanks a lot!