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Owning Class: filter implementation
Requires: MathScript RT Module
y = filter(b, a, x)
y = filter(b, a, x, 'direct')
[y, final] = filter(b, a, x, initial)
[y, final] = filter(b, a, x, initial, 'direct')
Applies a one-dimensional filter. filter works for vectors and matrices only.
Name | Description |
---|---|
b | Specifies the forward filter coefficients. b is a vector. |
a | Specifies the backward filter coefficients. If the first backward filter coefficient does not equal 1, LabVIEW normalizes the elements in a by the first backward filter coefficient. a is a vector. |
x | Specifies the signal to filter. x is a real or complex vector. |
initial | Specifies the initial conditions. initial is a vector. |
'direct' | Directs LabVIEW to use a direct convolution instead of a Fourier transform. Fourier transforms are faster for larger signals and filter lengths, but they introduce a small amount of round-off noise. |
Name | Description |
---|---|
y | Returns the filtered signal. y is a real or complex vector. |
final | Returns the final conditions. final is a vector. |
The following table lists the support characteristics of this function.
Supported in the LabVIEW Run-Time Engine | Yes |
Supported on RT targets | Yes |
Suitable for bounded execution times on RT | Not characterized |
x = 0:0.01:1;
b = [1];
a = [1, 1, 1];
y = filter(b, a, x)