Padé approximation of time delays
[num,den] = padecoef(T,N)
[num,den] = padecoef(T,N) returns the Nth-order Padé approximation of the continuous-time delay T in transfer function form. The row vectors num and den contain the numerator and denominator coefficients in descending powers of s. Both are Nth-order polynomials.
Class support for input T:
float: double, single
 Golub, G. H. and C. F. Van Loan Matrix Computations, 3rd ed. Johns Hopkins University Press, Baltimore: 1996, pp. 572–574.