for jj = 1:N
...
y{jj,ii}(:,1:(ii-1)) = x{jj}(:,1:(ii-1));
y{jj,ii}(:,(ii+1):end) = x{jj}(:,(ii+1):end);
...
end
Just loading the columns of the array from (ii+1)th to the last similarly as does the preceding line load from the first column to the (ii-1)th. The two lines together load all columns excepting for ii.
doc end
if it's that that's confusing -- it's a builtin that's position-sensitive as to what it returns, specifically.
