method_om {saccadr}

Extract saccades using an algorithm proposed by Otero-Millan et al. (2014) doi:10.1167/14.2.18

Description

Extract saccades using an algorithm proposed by Otero-Millan et al. (2014) doi:10.1167/14.2.18

Usage

method_om(x, y, vel, acc, sample_rate, trial, options)

Arguments

x

Gaze x coordinate, _arbitrary units_ as threshold velocity is computed in units of standard deviation.

y

Gaze x coordinate, _arbitrary units_ as threshold velocity is computed in units of standard deviation.

vel

Velocity data.frame with columns x, y, amp.

acc

Acceleration data.frame with columns x, y, amp.

sample_rate

Sample rate in Hz.

trial

Trial id, so that trial borders are respected when computing velocity and saccades.

options

Named list with method options. See details for further information.

Details

Method options, please refer to Otero-Millan et al. (2014) for details on parameters and the rationale for default values.

• om_minimal_inter_peak_time_ms Minimal inter-peak interval in milliseconds. Defaults to 30.

• om_maximal_peaks_per_second Maximal allowed number of peaks per second. Defaults to 5.

• om_velocity_threshold_deg_per_sec Threshold saccade velocity in °/s. Defaults to 3.

• om_pca_variance_threshold Minimal variance explained by retained rotated components. Defaults to 0.05.

Value

logical vector marking samples that belong to saccades

See Also

extract_saccades

Examples

# Do not run this function directly, use extract_saccades() instead