Activity Counts from a Raw .gt3x File

Compute activity counts from a raw ActiGraph .gt3x accelerometer file using the agcounts implementation of the ActiGraph count algorithm (Neishabouri 2022). Requires the agcounts and read.gt3x packages.

Usage

gt3x.counts(path, epoch = 60, lfe = FALSE, tz = "UTC")

Arguments

path

Path to a .gt3x file.

epoch

Epoch length in seconds (default 60).

lfe

Use the low-frequency extension filter (default FALSE).

tz

Time zone for the timestamps (default "UTC").

Value

Data frame with time, axis1, axis2, axis3 and vm, one row per epoch.

References

Neishabouri A, Nguyen J, Samuelsson J, Guthrie T, Biggs M, Wyatt J, Cross D, Karas M, Migueles JH, Khan S, Guo CC (2022). “Quantification of acceleration as activity counts in ActiGraph wearable.” Scientific Reports, 12, 11958. doi:10.1038/s41598-022-16003-x .

See also

axivity.counts, geneactiv.counts, read.raw