How can I append different mat file data set to be able to do the analysis

I am running an experiment on different subjects of 500 trials per subject. I have 20 subjects and data on each subject has been collected and analysed individually.I will like to add or append the saved mat file for each subject in order to have the group statistics. How do I go about it. Find below how I tried to add the first 4 subjects. Thank you



Data_session=[];
filename=('session.mat')
for j=1:size(data,4)
    a=load('sess1')
    b=load('sess2')
    c=load('sess3')
    d=load('sess4')
    save('session.mat','a','b','c','d')
    save('session.mat','a','b','c','d',-'append')
    
end

Answer 1

[Dinesh Yadav]

Hi Enoch

Go through the following link and check the answer by Guillaume and a comment by Leigh Martin.

https://www.mathworks.com/matlabcentral/answers/33113-append-save-same-variable-with-updated-values-into-mat-file-row-wise

I am attching a code file based on their answer for your implementation. Hope it helps.