PARSEFILT Procedure (PV-WAVE Extreme Advantage)

Parses a filter structure and returns the individual members of the structure.

Usage

PARSEFILT, h, name, b, a

Input Parameters

h—A filter structure.

Returned Value

name—A scalar string containing the name field of the filter.

b—The coefficients of the numerator polynomial of the filter.

a—The coefficients of the denominator polynomial of the filter.

Keywords

None.

Discussion

PARSEFILT parses a filter structure, H(z):

and returns the individual coefficients of the numerator and the denominator polynomials of the structure.

Example

In this example, an IIR filter is created using IIRDESIGN, and the individual parts of the filter are extracted using PARSEFILT.

h = IIRDESIGN(7, .5, /Butter)

PARSEFILT, h, name, b, a

PM, name, Title = 'Filter name:'

PM, b, Title = 'Numerator Coefficients:'

PM, a, Title = 'Denominator Coefficients:'