Rational representation

Transfer functions can be expressed as a quocient of polynomials as in the following expression

The constructor can be used in different ways

From coefficients

The standard way is to input the coefficients of your filter. The constructor accepts as a optional properties the name

    >> rat   = rational([1 3 5 7],[5 10 0.01],'filter_name')
    ---- rational 1 ----
    model:    filter_name
    num:      [1 3 5 7]
    den:      [5 10 0.01]
    iunits:   []
    ounits:   []
    --------------------

From partial XML file

You can input a XML file containing a transfer function model into the constructor

    >> rat   = rational('datafile.xml')

From mat file

You can input a mat file containing a transfer function model into the constructor

    >> rat   = rational('datafile.mat')

From plist

All the properties of the filter can be specified in a plist and then passed to the constructor:

    >> pl = plist('iunits','m','ounits','V','num',[1 3 10],'den',[4 6],...
    'name','filter_mame');
    >> par   = parfrac(pl)
    ---- rational 1 ----
    model:    filter_mame
    num:      [1 3 10]
    den:      [4 6]
    iunits:   [m]
    ounits:   [V]
    --------------------

From repository

Rational transfer function can be obtained from the repository with the following syntax.

    >> rat   = rational('Hostname','localhost','Database','ltpda',...
    'ID',[],'CID',[],'Binary',yes)

$Sum of partial fractions representation$

Sum of partial fractions representation

Converting models between different representations