How to load a batch file?

I have 2 questions first question. Right now i have a code that is a for loop:

filenames=cellstr(ls([Dir,'\*.mat*'])); %create a cell of all files in the directory named Dir containing the string '.mat' for j=1:length(filenames) % for loop to loop through each of the length(filenames) number of .mat files in Dir load(fullfile(Dir,filenames{j}),'percentiles'); %load the jth .mat file to the variable named percentiles. You can play with this variable like any other matlab variable. %The variable named 'percentiles' has 11 rows and two columns as described in the email filenames{j}%use curly brackets to print out the jth .mat file name from the cell matrix named 'filenames' percentiles;%print the contents of the variable named 'percentiles'

end

How do i have it open certain file names? Also how do you print 2 columns in one cell for example i have

1 2 2 4

and I would like it to be (1,2).