how to determine the parameters in process_xxx.m

Hello, I am very interested in your work. I want to ask how to determine the parameters (i.e. 60: 80, 1:29, and 1:100) in process_xxx.m, for example, the chikusei_pan = mean(chikusei(:,:,60:80), 3); Botswana_pan = mean(Botswana(:,:,1:29), 3); pavia_pan = mean(pavia(:,:,1:100), 3); 