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SIMP(G) Scilab Function SIMP(G)
NAME
simp - rational simplification
CALLING SEQUENCE
[N1,D1]=simp(N,D)
H1=simp(H)
PARAMETERS
N,D : real polynomials or real matrix polynomials
H : rational matrix (i.e matrix with entries n/d ,n and d real polynomi-
als)
DESCRIPTION
[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 ration-
als. It is possible to toggle simplification on or off using simp_mode
function.
EXAMPLES
s=poly(0,'s');
[n,d]=simp((s+1)*(s+2),(s+1)*(s-2))
simp_mode(%F);hns=s/s
simp_mode(%T);hns=s/s
SEE ALSO
roots, trfmod, poly, clean, simp_mode
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