cows_5hz {triact} | R Documentation |
cow acceleration data
Description
Acceleration data collected with triaxial accelerometers (MSR145, MSR Electronics, Switzerland) attached to the left hind leg of two dairy cows (cow01, cow02). The accelerometer sampling frequency was 5 Hz. The forward, up, and right acceleration correspond to body relative directions as used in triact (see vignette("introduction", package = "triact")
and Simmler & Brouwers, 2023).
colname | type | description |
id | Factor | unique id for the cow |
time | POSIXct | timestamp |
acc_fwd | numeric | acceleration from forward axis (units: g) |
acc_up | numeric | acceleration from up axis (units: g) |
acc_right | numeric | acceleration from right axis (units: g) |
Usage
cows_5hz
Note
From the raw data files distributed with the triact package, cows_5hz
can be reproduced as follows:
# create a Triact object my_triact <- Triact$new() input_dir <- system.file("extdata", package = "triact") # load data from files # note the mapping of XYZ to forward, up, right (parameter timeFwdUpRight_cols) my_triact$load_files(input = input_dir, id_substring = c(1, 5), timeFwdUpRight_cols = c(1, -2, 3, -4), tz = "Europe/Zurich", skip = "DATA") cows_5hz_recreated <- my_triact$data # test whether they are identical identical(cows_5hz_recreated, cows_5hz)
Source
Agroscope, 8356 Ettenhausen, Switzerland
References
Simmler. M., Brouwers S. P., 2023. Triact package for R: Analyzing the lying behavior of cows from accelerometer data. pdf
[Package triact version 0.3.0 Index]