Reading your files in a loop depends on what is in them and how you have named them. Without more information, it is not possible to write that code.
One approach to the plots:
x = 0:19; % Create Data
y = randi(9, 10, 20); % Simulate ‘.mat’ File Inputs
for k1 = 1:size(y,1)
subplot(5, 2, k1) % Create 5-Row x 2-Column Array Of Subplots
plot(x, y(k1,:))
grid
title(sprintf('Subplot #%d', k1))
end
