two way repeated measures anova

how to do a 2 way repeated measures anova with MATLAB? I need to perform a 2 way anova for a repeated measures data, each having 2 levels. I see anova2 is to be used for between subject designs and anovan when the design is unbalanced. Any advice would be of great help.

[Jeff Miller]

See if this previous answer helps

[Shamini Warda]

Hi. Many thanks for this. this code works fine, but it gives different results. here is how i used it. I have 2 within subject factors, each having two levels.

levels were arranged column wise with 29 observations row wise for each levels

data = [li_l(:,1), li_s(:,1), si_l(:,1), si_s(:,1)];

datatable = array2table(data);

datatable.Properties.VariableNames = {'li_lr','li_sr','si_lr','si_sr'};

WithinFactors = table([1 1 2 2]',[1 2 1 2]','VariableNames',{'Interval','Response'});

rm = fitrm(datatable,'li_lr,li_sr,si_lr,si_sr~1','WithinDesign',WithinFactors);

ranovatable = ranova(rm,'WithinModel','Interval*Response');

any suggestions would be of immense help.

Thank you.

[Jeff Miller]

Different results than what?

You probably want to use the 'categorical' command to tell ranova that the numbers in WithinFactors represent arbitrary category labels rather than numerical values of some predictor.

[Shamini Warda]

It now works. Thank you very much.

Answer 1

[Scott MacKenzie]

Visit this question for a simple approach to doing a two-way repeated measures (aka within-subjects) anova using the ranova function.