How to compute several means for same class

Hello.

I want to use prototypical networks using an average of the same class.

This link is very useful for me, but I didn't find a specific answer. (Thank you so much. Ameer Hamza)

https://www.mathworks.com/matlabcentral/answers/514912-how-to-use-calculate-the-several-means-of-same-class

Each class has 10 data (rows), I want to select 5 rows randomly and compute the mean of selected rows.

Finally, I hope to get several rows for same class.

For example,

1 row : the first mean of class 1 (randomly selected 5 rows)

2 row : the second mean of class 1 (randomly selected 5 rows)

......................

Could I get great idea to fix this code?

data = csvread('outfile.csv');
values = data(:,1:end-1);
labels = data(:,end);
avg = splitapply(@(x) {mean(x,1)}, values, labels+1);