You are here: NI Home > Support > Product Reference > Manuals > LabVIEW 8.5 Help

Member of the filter design class.

Syntax

b = intfilt(r, l, alpha)

b = intfilt(r, n, 'Lagrange')

[b, a] = intfilt(r, l, alpha)

[b, a] = intfilt(r, n, 'Lagrange')

Description

Designs an interpolation FIR filter.

Examples

Inputs

Name	Description
r	Specifies the number of zeros to insert between each sample.
l	Specifies the number of samples used to interpolate.
alpha	LabVIEW multiplies alpha by the Nyquist frequency. alpha is a real number between 0 and 1.
n	Specifies the order of the Lagrange polynomial.
'Lagrange'	Directs LabVIEW to design an FIR filter that performs Lagrange polynomial interpolation.

Outputs

Name	Description
b	Returns the numerator coefficients of the filter. b is a vector.
a	Returns the denominator coefficients of the filter. a is a vector.

Examples

r = 3;
n = 2;
[b, a] = intfilt(r, n, 'Lagrange')

r = 3;
l = 2;
alpha = 1;
b = intfilt(r, l, alpha)

Related Topics

resample