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# 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;
```
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