method_nh {saccadr} | R Documentation |
Extract saccades using an algorithm proposed by Nyström and Holmqvist (2010) doi:10.3758/BRM.42.1.188.
Description
Extract saccades using an algorithm proposed by Nyström and Holmqvist (2010) doi:10.3758/BRM.42.1.188.
Usage
method_nh(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 y coordinate, _arbitrary units_ as threshold velocity is computed in units of standard deviation. |
vel |
Velocity |
acc |
Acceleration |
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 Nyström and Holmqvist (2010) for details on parameters and the rationale for default values.
nh_sg_filter_order
Order of Savitzky-Golay filter. Defaults to2
.nh_max_velocity
Maximal physiologically plausible velocity in °/s. Defaults to1000
.nh_max_acceleration
Maximal physiologically plausible acceleration in °/s². Defaults to100000
.nh_initial_velocity_threshold
Initial velocity threshold in °/s. Defaults to100
.
Value
logical vector marking samples that belong to saccades
See Also
Examples
# Do not run this function directly, use extract_saccades() instead