{ } means , it is a cell , a way of encapsulating raw data  (such as double /char etc)

So , loads{k,1} => cell name loads  that is an array

E.g: loads={"Inno" ,"Renew"};   %results in a 1 x2 cell structure

loads{1,1} would be === Inno and loads{1,2} ===Renew

https://www.mathworks.com/help/matlab/ref/cell.html

Hi, but is it 'loads'?

agree with Aparna Sathya Murthy

loads is user defined cell name here .

loads{5,5}=[];

>> for k=2:4

loads{k,1}=loads{k-1,1}+1;

loads{k,2}='py';

end

>> loads

loads =

[] [] [] [] []

[] 'py' [] [] []

[] 'py' [] [] []

[] 'py' [] [] []

[] [] [] [] []