Creating Violin Plots how to reorder categories in custom order.

Hi,

I am trying to take data from a table and generate violin plots. below is the script i am using and the results Im getting.

I have read the data directly in from an excel file is a 180x7 structured table.

I have 3 colums of Data in my table (T). Which are T.PeakFlexMom, T.PeakValMom T.PeakIntRotMom. And One column (T.Task) which Described the type of test used.

I want the values to be plotted on the table as 'RUN', 'Planned SS', 'Unplanned SS' however it always defaults to alphebetical order ('Planned SS', 'RUN', 'Unplanned SS')

Any help would be much appreciated.

subplot(3,1,1)
violinplot(T.PeakFlexMom,T.Task,'Width',0.1,...
    'ViolinAlpha',0.1,'EdgeColor',[1 0 0],...
    'ShowData',false,'ShowMean',true)
xlabel('Flexion')

subplot(3,1,2)
violinplot(T.PeakValMom, T.Task,'Width',0.1,...
    'ViolinAlpha',0.1,'EdgeColor',[0 1 0],...
    'ShowData',false,'ShowMean',true)
xlabel('Valgus')

subplot(3,1,3)
violinplot(T.PeakIntRotMom,T.Task,'Width',0.1,...
    'ViolinAlpha',0.1,'EdgeColor',[0 0 1],...
    'ShowData',false,'ShowMean',true)
xlabel('Internal Rotation')

Answer 1

[Adam Danz]

Use B = reordercats(A,neworder) to change the order of your categorical variables.

Use C = categories(A) to see the current categorical order.

[Sean Byrne]

Thank you for your comment.

With a little digging I figured out what i needed to do to create the data data into a categorical array.

valueset = {'RUN' 'Planned SS' 'Unplanned SS'};
T.Task = categorical(T.Task,valueset);

T.Task = reordercats(T.Task,{'RUN','Planned SS','Unplanned SS'});

[Adam Danz]

Looks good!

From your title, I assumed your data were already categorical.