Filter (Bandstop » Windowed FIR) (G Dataflow)

A value that affects the output coefficients when window type is Kaiser, Gaussian, or Dolph-Chebyshev.

If window type is any other type of window, this node ignores this input.

This input represents the following information for each type of window:

• Kaiser—Beta parameter
• Gaussian—Standard deviation
• Dolph-Chebyshev—The ratio of the main lobe to the side lobe, s, expressed in decibels

Default: NaN—Causes this node to set beta to 0 for a Kaiser window, the standard deviation to 0.2 for a Gaussian window, and s to 60 dB for a Dolph-Chebyshev window

Type of the smoothing window.

Smoothing windows decrease ripple in the filter passband and improve the ability of the filter to attenuate frequency components in the filter stopband.

Default: Rectangle

A Boolean that specifies the initialization of the internal state of the node.

This node automatically initializes the internal state to zero on the first call and runs continuously until this input is True.

Default: False

Input signal.

This input accepts the following data types:

• Waveform
• Double-precision, floating-point number
• Complex double-precision, floating-point number
• 1D array of waveforms
• 1D array of double-precision, floating-point numbers
• 1D array of complex double-precision, floating-point numbers
• 2D array of double-precision, floating-point numbers

Low cutoff frequency of the filter. low cutoff frequency must be less than high cutoff frequency.

Default: 0.125

High cutoff frequency of the filter. high cutoff frequency must be greater than low cutoff frequency and less than 0.5*f_s, where f_s is the sampling frequency.

Default: 0.45

Number of taps in the FIR filter.

Default: 25

Order of the filter.

Default: 2

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error	error in contains an error
If no error occurred before the node runs, the node begins execution normally. If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.	If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

Sampling frequency in Hz. sampling frequency must be greater than zero.

This input is available only if you wire one of the following data types to signal:

• Double-precision, floating-point number
• Complex double-precision, floating-point number
• 1D array of double-precision, floating-point numbers
• 1D array of complex double-precision, floating-point numbers
• 2D array of double-precision, floating-point numbers

Default: 1, which is the normalized sampling frequency

Result of filtering the input signal.

This output can return the following data types:

• Waveform
• Double-precision, floating-point number
• Complex double-precision, floating-point number
• 1D array of waveforms
• 1D array of double-precision, floating-point numbers
• 1D array of complex double-precision, floating-point numbers
• 2D array of double-precision, floating-point numbers

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error	error in contains an error
If no error occurred before the node runs, the node begins execution normally. If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.	If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.