How could I do the Percentage of Change on Source data?

Dear Francois:

Thanks for your response.
However, I still have some problems writing the script of a percentage of change data on the brainstorm interface.
I have tried my best as follows, but I don't know it is correct or not.
Would you help me to check the process?
Thank you very much.




I put the 'results_PercentageChangeC1.mat' file back to the folder to show the source results.
I attached the process files on the link:
https://drive.google.com/drive/folders/1KfaheLmLRwMdm-C5dSiAjHjyLVBFX5sv?usp=sharing
Thank you very much!