Filter Signal

Module name: FilterSignal

Package: CEAMSModules 7.4.0

Version: 2.1.0

Overview

This plugin applies a FIR/IIR filter to EEG signals.

Inputs

Input	Format	Default	Description
signals	list of SignalModel	None	list of SignalModel to filter
type	‘bandpass’, ‘lowpass’, ‘highpass’, ‘bandstop’	bandpass	Configuration value for type.
IR_family	‘IIR’, ‘FIR’	IIR	Configuration value for IR family.
use_std_order	bool or str	False	If True, the order is calculated based on the formula: order=5*(sample_rate/lower frequency) If False, the order is taken from the [order] parameter.
order	int or str	6	Filter order
cutoff	float or str	0.3, 64	Cutoff frequency, must be an increasing value between 0 and sample_rate/2
window	str	hamming	Desired window ex: ‘hamming’ – see: https://docs.scipy.org/doc/scipy/reference/generated/ for all options.

Outputs

Output	Format	Description
signals	list of SignalModel	Filtered signals

Usage in a process

1. Open Dev Tools -> New process in Snooz.

2. In the Module Library, find Filter Signal under the Signal Processing category.

3. Drag the module onto the process canvas.

4. Connect the required inputs from upstream modules (or set values in the Settings tab).

5. Connect outputs to downstream modules as needed.

6. Double-click the module to configure parameters in the Settings tab.

7. Run the process and inspect results in the Results tab.

Note

For general guidance on building processes with modules, see Explore examples.