Hi Francis,
There are a number of ways to approach this problem. One simple method is to think of using logical operators to filter out the data. I show this method below. You should be a bit careful in how you choose to filter the data using logic, as you may or may not want to include particular limit values.
% Creating Sample Data
data = round(100+9900*rand(2784,1));
% Setting the limits for matrices A an B
A_lim = [100,999];
B_lim = [1e3,1499];
% Creating indexed filters for the data array in finding values in the
% range for A_lim and B_lim
filt_A = data >= A_lim(1) & data <= A_lim(2); % Using logic operators
filt_B = data >= B_lim(1) & data <= B_lim(2);
% Note, you should be careful about inclusion of the limit values
% Saving the data into arrays A and B filtered by the range
A = data(filt_A);
B = data(filt_B);
There are certainly other ways of generating the arrays A and B, such as using ismember if you generate particular values that you want to compare to, rather than ranges of values.
Hope that helps!
