Help with anova design

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Manash Sahoo
Manash Sahoo 2021-10-11
回答： Shivansh 2024-4-5
Hi there.
I have data formatted as such:
ID ClipNumber ROI1 ROI2 ROI3 ROI4 Dx
-------------------------------------------------------------------------------
1 1 .1 .3 .5 .1 1
1 2 etc. - - - 1
1 3 - - - - 1
1 4 - - - - 1
1 5 - - - - 1
2 1 - - - - 0
Where Dx is the between-subjects factor, and ClipNumber is a within-subjects factor, and ROIs repeated measures.
Reading over the doc I am a bit confused on how to set up a repeated measures anova with my data. Is there anyone that can lead me to the right path?
Mainly, my confusion lays in creating the "WithinDesign" table, and the "modelspec" input arg.
Any help would be great,
Thanks!

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回答（1 个）

Shivansh
Shivansh 2024-4-5
Hi Manash!
It looks like you want to do ANOVA analysis for your data. You can refer to the below steps and modify them according to your needs.
  • Prepare Data: Ensure your data is in a MATLAB table with appropriate columns for IDs, ClipNumber, ROIs, and Dx. You should also handle the missing values.
  • Create WithinDesign Table:
WithinDesign = table([1;2;3;4;5],'VariableNames',{'ClipNumber'});
  • Specify Model:
modelspec = 'ROI1-ROI4 ~ Dx';
  • Fit Model:
rm = fitrm(yourDataTable,'ROI1-ROI4 ~ Dx','WithinDesign',WithinDesign);
  • Run ANOVA:
ranovaResults = ranova(rm);
This setup allows you to analyze the effect of "Dx" on "ROIs" across different "ClipNumbers".
You can refer to the following documentations to learn more about "ranova" in MATLAB:
https://www.mathworks.com/help/stats/repeatedmeasuresmodel.ranova.html.
I hope it helps!

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