How can i save Matrix with rows depend on the loop?

I have the following loop :

_for k = 1 : length(theFiles)

baseFileName = theFiles(k).name;

fullFileName = fullfile(myFolder, baseFileName);

fprintf(1, 'Now reading %s\n', fullFileName);

x = readtable(fullFileName);

x.x_________SCADA_________________=categorical(x.x_________SCADA_________________);

idx=not(x.x_________SCADA_________________==['ΣΤΡΑΤΟΣ 2']);

x(idx,:)=[];

end_

The loop returns the table x with only one row and 26 collums at each k. I want this row to save it into a second table ,called y, along with all the other results of the loop at the row number y(k,:) which depends from the k that is running each time!

Is this possible?