# A property

Class: rfmodel.rational
Package: rfmodel

Poles of rational function object

Vector

## Description

Complex vector containing poles of the rational function in radians per second. Its length, shown in

$F\left(s\right)=\left(\sum _{k=1}^{n}\frac{{C}_{k}}{s-{A}_{k}}+D\right){e}^{-s\tau }\begin{array}{cc},& s=j2\pi f\end{array}$

as `n`, must be equal to the length of the vector you provide for `'C'`. `n` is the number of poles in the rational function ojbject. This property is empty by default.

## Examples

```rat = rfmodel.rational; rat.A = [-0.0532 + 1.3166i; -0.0532 - 1.3166i]*1e10; ```