simp rational simplification [N1,D1]=simp(N,D) H1=simp(H) N,D real polynomials or real matrix polynomials H rational matrix (i.e matrix with entries n/d ,n and d real polynomials) [n1,d1]=simp(n,d) calculates two polynomials n1 and d1 such that n1/d1 = n/d. If N and D are polynomial matrices the calculation is performed element-wise. H1=simp(H) is also valid (each entry of H is simplified in H1). Caution: -no threshold is given i.e. simp cannot forces a simplification. -For linear dynamic systems which include integrator(s) simplification changes the static gain. (H(0) for continuous systems or H(1) for discrete systems) -for complex data, simp returns its input(s). -rational simplification is called after nearly each operations on rationals. It is possible to toggle simplification on or off using simp_mode function. roots trfmod poly clean simp_mode