How to save variables into a matrix

Hi, I have the following code that produces i, j and z values. Is it possible to save the values in a matrix instead of just displaying them using fprintf?

Thanks

sz = size(ortho);
md= median(ortho);
pks = zeros(sz(1),sz(2));
for i =2:sz(1)-1
    for j =2:sz(2)-1
        if ortho(i-1,j) < ortho(i,j) & ...
           ortho(i+1,j-1) < ortho(i,j) & ...
           ortho(i,j-1) < ortho(i,j) & ...
           ortho(i,j+1) < ortho(i,j)  
            pks(i,j) = 1;
            fprintf("i=%d j=%d z=%d \n",i,j,ortho(i,j));


        end
     end
end

Answer 1

[KSSV]

count = 0 ; 
iwant = zeros([],3) ;  % to store i,j,ortho(i,j) in respective columns 
sz = size(ortho);
md= median(ortho);
pks = zeros(sz(1),sz(2));
for i =2:sz(1)-1
    for j =2:sz(2)-1
        if ortho(i-1,j) < ortho(i,j) & ...
           ortho(i+1,j-1) < ortho(i,j) & ...
           ortho(i,j-1) < ortho(i,j) & ...
           ortho(i,j+1) < ortho(i,j)  
            pks(i,j) = 1;
            fprintf("i=%d j=%d z=%d \n",i,j,ortho(i,j));
            count = count+1 ; 
            iwant(count,:) = [i j ortho(i,j)] ;
        end
     end
end
iwant

[Oscar Zampi]

Thank you very much, it works perfectly.