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Owning Class: filter design
Requires: MathScript RT Module
grpdelay(b)
grpdelay(b, a)
grpdelay(b, a, n)
grpdelay(b, a, n, 'whole')
grpdelay(b, a, n, f)
grpdelay(b, a, n, 'whole', f)
grpdelay(b, a, w)
grpdelay(b, a, w, f)
gd = grpdelay(b, a)
gd = grpdelay(b, a, n)
gd = grpdelay(b, a, n, 'whole')
gd = grpdelay(b, a, n, f)
gd = grpdelay(b, a, n, 'whole', f)
gd = grpdelay(b, a, w)
gd = grpdelay(b, a, w, f)
[gd, fr] = grpdelay(b)
[gd, fr] = grpdelay(b, a)
[gd, fr] = grpdelay(b, a, n)
[gd, fr] = grpdelay(b, a, n, 'whole')
[gd, fr] = grpdelay(b, a, n, f)
[gd, fr] = grpdelay(b, a, n, 'whole', f)
[gd, fr] = grpdelay(b, a, w)
[gd, fr] = grpdelay(b, a, w, f)
Computes the group delay of a filter. If you do not request an output, this function plots the group delay in the current plot window. grpdelay(b) is equivalent to grpdelay(b, [1], 512). grpdelay(b, a) is equivalent to grpdelay(b, a, 512).
Name | Description |
---|---|
b | Specifies the forward filter coefficients. b is a real vector. |
a | Specifies the backward filter coefficients. a is a real vector. The default is [1]. |
n | Specifies the number of frequencies to use. n is a nonnegative integer. The default is 512. |
w | Specifies predefined frequencies. If you do not specify w, LabVIEW evaluates the frequency response at n points equally spaced around the upper half of the unit circle. w is a vector. |
f | Specifies the sampling frequency. f is a scalar. |
'whole' | Indicates that you want to use the whole unit circle. |
Name | Description |
---|---|
gd | Returns the group delay of the filter defined by a and b. gd is a real vector. |
fr | Returns the corresponding frequencies of the filter. fr is a real vector. |
The following table lists the support characteristics of this function.
Supported in the LabVIEW Run-Time Engine | Yes (if you request output) |
Supported on RT targets | Yes (if you request output) |
Suitable for bounded execution times on RT | Not characterized |
W = 0:0.01:0.5;
A = [1];
B = [1, 4, 1, 6];
GD = grpdelay(B, A, W)
b = [2, 3, 7, 1];
a = [1, 7, 3, 10];
n = 250;
f = 20;
[GD, FR] = grpdelay(b, a, n, 'whole', f)