M = [1.1, -5.0, 4.7;  -4.0, 4.7, -22.3;  -4.1, 2.3, 19.2]
M =
    1.1000   -5.0000    4.7000
   -4.0000    4.7000  -22.3000
   -4.1000    2.3000   19.2000

    R = [1.6, -16.5, 10.5]
R =
    1.6000  -16.5000   10.5000

    C = [0.7; -5.1; -4.8]
C =
    0.7000
   -5.1000
   -4.8000

    M(2,3)          or        disp(M)
ans =
  -22.3000

    disp(ndims(M)); disp(ndims(R)); disp(ndims(C))                
         2
         2
         2
    disp(size(M)); disp(size(R)); disp(size(C))   
         3     3
         1     3
         3     1