MATLAB: Undefined function or variable ‘ranova’

MATLABranova bug

Hello, I am running Matlab R2018a. I have the statistics and machine learning toolbox but when I try to run ranova (repeated measures anova) I get "Undefined function or variable 'ranova' ". anova1 and friedman work perfectly. Any ideas what the problem might be?

Thanks

Best Answer

The only ranova function I see in the documentation is this one. In order to call this function, the first input must be a RepeatedMeasureModel object usually created by calling the fitrm function. Are you trying to call ranova on the output of fitrm or are you trying to call it on an array of data?

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MATLAB: Ranova with two within factors

datatable.Properties.VariableNames = {'pre_A','pre_B','post_A','post_B'};
% When you have more than one repeated-measures factor, you must set up a table
% to indicate the levels on each factor for each of your different variables.
% Here is the command you need for this case:
WithinStructure = table([1 1 2 2]',[1 2 1 2]','VariableNames',{'PrePost','TreatAB'});
% The 4 different rows of the WithinStructure table correspond to the 4 different
% columns, 'pre_A','pre_B','post_A','post_B', respectively, in your data table.
% Each 'pre_A','pre_B','post_A','post_B' column is coded as 1/2 on the PrePost factor
% and as 1/2 on the TreatAB factor.
% (Added based on later comments:)
% Indicate that the 1's and 2's of WithinStructure are category labels
% rather than regression-type numerical covariates:
WithinStructure.PrePost = categorical(WithinStructure.PrePost);
WithinStructure.TreatAB = categorical(WithinStructure.TreatAB);
% Now pass the WithinStructure table to fitrm so that it knows how the different
% columns correspond to the different levels of the repeated-measures factors.
rm = fitrm(datatable, 'pre_A,pre_B,post_A,post_B~1','WithinDesign',WithinStructure);
% Finally, you need to specify the repeated-measures factors again when you call ranova, like this:
ranovatable = ranova(rm,'WithinModel','PrePost*TreatAB');

Best Answer

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