Downsampling EEG data

Source: R/data_modifiers.R

Performs low-pass anti-aliasing filtering and downsamples EEG data by a specified factor. This is a wrapper for decimate from the signal package. Note that this will also adjust the event table, moving events to the nearest time remaining after downsampling

eeg_downsample(data, ...)

# S3 method for eeg_data
eeg_downsample(data, q, ...)

# S3 method for eeg_epochs
eeg_downsample(data, q, ...)

Arguments

data

An eeg_data object to be downsampled
...

Parameters passed to functions
q

Integer factor to downsample by

Methods (by class)

  • eeg_data: Downsample eeg_data objects

  • eeg_epochs: Downsample eeg_epochs objects

Author

Matt Craddock matt@mattcraddock.com

Examples

eeg_downsample(demo_epochs, 2)

#> Downsampling from 128Hz to 64Hz.
#> Epoched EEG data
#> 
#> Number of channels	: 11 
#> Number of epochs	: 80 
#> Epoch limits		: -0.197 - 0.443 seconds
#> Electrode names		: A5 A13 A21 A29 A31 B5 B6 B8 B16 B18 B26 
#> Sampling rate		: 64  Hz
#> Reference		: average