select

class neuxus.nodes.select.ChannelSelector(input_port, mode, selected)

Select a subset of signal channels

Attributes:

• output (port): output port

Args:

• mode (‘index’ or ‘name’): indicate the way to select data

• selected (list): column to be selected

Example:

ChannelSelector(port1, port2, ‘index’, [2, 4, 5]) ChannelSelector(port1, port2, ‘name’, [‘Channel 2’, ‘Channel 4’])

class neuxus.nodes.select.CommonAverageReference(input_port)

Re-referencing the signal to common average reference consists in subtracting from each sample the average value of the samples of all electrodes at this time Attributes:

• output (port): output GroupOfPorts

example: CommonReferenceChannel(input_port)

class neuxus.nodes.select.ReferenceChannel(input_port, mode, ref)

Subtracts the value of the reference channel from all other channels Attributes:

• output (port): output GroupOfPorts

Args:

• mode (‘index’ or ‘name’): indicate the way to select data

• reference channel (str or int): column to be substracted

example: ReferenceChannel(input_port, ‘index’, 4)

or ReferenceChannel(input_port, ‘name’, ‘Cz’)

class neuxus.nodes.select.SpatialFilter(input_port, matrix)

Maps M inputs to N outputs by multiplying the each input vector with a matrix

Attributes:

• output (port): output GroupOfPorts

Args:

• input_port (port): input port

• matrix (dict or str): path to the matrix yaml/xml/cfg file OR dictionnary with new channel name as keys and list of coefficients as values, list must be of the same length as input.channels

Example:

• SpatialFilter(input_port, ‘../example/my_matrix.yaml’) where my_matrix is the following yaml file:

  — # Matrix of coefficient for SpatialFilter OC1: [1, 1, 0, 4e-9] OC2: [4, 2, 4, -2] …

• SpatialFilter(input_port, ‘../example/my_matrix.cfg’) where my_matrix is the following cfg file:

  <SettingValue>7.352412e-002 2.354113e-001 -1.212912e-001 -3.687871e-002 2.785947e-002 9.112804e-003 2.665961e-001 1.635848e-001 -1.540287e-002 -1.944730e-002 -7.130017e-002 -6.074913e-001</SettingValue> <SettingValue>2</SettingValue> <SettingValue>6</SettingValue>

  (first setting values are coefficients

  second one is the number of output channels last one is the number of input channels)

• SpatialFilter(input_port, matrix) where matrix = {

  ‘OC2’: [4, 0, -1e-2, 0], ‘OC3’: [0, -1, 2, 4]

  }