laser_gun_data: Laser Gun Data
In shorts: Short Sprints

laser_gun_data

R Documentation

Laser Gun Data

Description

Performance of 35m sprint by a youth basketball player done using standing start. Sample was collected by laser gun (CMP3 Distance Sensor, Noptel Oy, Oulu, Finland) and was sampled at a rate of 2.56 KHz. A polynomial function modeling the relationship between distance and time was employed and subsequently resampled at a frequency of 1,000 Hz using Musclelab™ v10.232.107.5298, a software developed by Ergotest Technology AS located in Langesund, Norway. Data was further modified by calculating raw acceleration using dv/dt (using smoothed velocity provided by the system), and then smoothed out using 4th-order Butterworth filter with a cutoff frequency of 1 Hz.

Usage

data(laser_gun_data)

Format

Data frame with 6 variables and 4805 observations:

time: Time vector in seconds
distance: Distance vector in meters
velocity: Smoothed velocity vector in m/s; this represent step-averaged velocity
raw_velocity: Raw velocity vector in m/s
raw_acceleration: Raw acceleration vector in m/s/s; calculated using difference in smoothed velocity divided by time difference (i.e., dv/dt method of derivation)
butter_acceleration: Smoothed acceleration vector in m/s/s; smoothed out using 4th-order Butterworth filter with a cutoff frequency of 1 Hz