Access discrete-time transfer function data in DSP format. Argument sys is not limited to transfer function models. If sys is not a transfer function, it is converted automatically.
Inputs
Any type of discrete-time LTI model.
For SISO models, return num and den directly as column vectors instead of cells containing a single column vector.
Outputs
Cell of numerator(s). Each numerator is a row vector containing the coefficients of the polynomial in ascending powers of z^-1. num{i,j} contains the numerator polynomial from input j to output i. In the SISO case, a single vector is possible as well.
Cell of denominator(s). Each denominator is a row vector containing the coefficients of the polynomial in ascending powers of z^-1. den{i,j} contains the denominator polynomial from input j to output i. In the SISO case, a single vector is possible as well.
Sampling time in seconds. If tsam is not specified, -1 is returned.
Package: control