MATLAB: Separate row indices of a Matrix in two groups

Question

Hello~

I have 256 x 256 matrix. In this matrix, I have chose some row indices (& all columns) as my pilot locations. Now, how to choose rest of the rows as data location.

e.g. > main_matrix= randi([0,10],256);
pilot_loc= (1:N:256);             % N is a variable.
data_loc=???    

How to put rest of the row indices in data_loc? I hope you understand.

Answer 1

pilot_loc= (1:N:256);             % N is a variable.
data_loc = setdiff(1:256,polot_loc) ;