ranova function output contains only NaN

I am trying to calculate a ranova with matlab. I defined the model as follows:

WithinFacs = table(confirmatoryTable_alpha_pre_young.hemifield,confirmatoryTable_alpha_pre_young.setsize,'VariableNames',{'hemifield','setsize'});

rm_alpha_pre = fitrm(confirmatoryTable_alpha_pre_young, 'value ~ hemifield*setsize','WithinDesign', [3:4])

ranova(rm_alpha_pre)

However the output keeps looking like this:

Somebody else already had this problem?

Answer 1

[Shivansh]

Hi Alenka!

The function "ranova" resulting in only "NaN" values can be due to the following reasons:

1. Missing Data: Make sure that the data is properly preprocessed and doesn't contain any "NaN" values.
2. Within-Subjects Design: Try using a table in the "WithinDesign" argument in "fitrm".
3. Factor-levels: You can also verify that the factors have multiple levels.

Please refer to the following documentation link for more information about "ranova": https://www.mathworks.com/help/stats/repeatedmeasuresmodel.ranova.html.

I hope the above points help in resolving the issue.