RREF

 

 Reduced row echelon form.

  R = RREF(A) produces the reduced row echelon form of A.

 

 

  [R,jb] = RREF(A) also returns a vector, jb, so that:

      r = length(jb) is this algorithm's idea of the rank of A,

      x(jb) are the bound variables in a linear system, Ax = b,

      A(:,jb) is a basis for the range of A,

      R(1:r,jb) is the r-by-r identity matrix.

 

 

  [R,jb] = RREF(A,TOL) uses the given tolerance in the rank tests.

 

 

  See also RREFMOVIE23860BV, RANK1DJZJU2, ORTH1B15GU2, NULL1A3XKU2, QRM02QU2, SVDN27CU2.