get_VM: Calculate vector magnitude
In AGread: Read Data Files from ActiGraph Monitors

get_VM

R Documentation

Calculate vector magnitude

Description

Calculate vector magnitude

Usage

get_VM(triaxial, method = c("legacy", "Rcpp"), verbose = FALSE)

get_VM_C(x, y, z)

Arguments

`triaxial`	a dataframe of triaxial data on which to calculate vector magnitude
`method`	which method to use, either `legacy` (default, for backwards compatibility) or `Rcpp` (gives the same results, faster but more particular)
`verbose`	print information about variable search criteria?
`x`	NumericVector. X-axis values
`y`	NumericVector. Y-axis values
`z`	NumericVector. Z-axis values

Value

a vector of vector magnitude values

Examples

data(imu_to_collapse)

vm_columns <-
    grepl("accelerometer",
        names(imu_to_collapse),
        ignore.case = TRUE)

vm_values <- get_VM(
  data.frame(imu_to_collapse)[, vm_columns]
)

head(vm_values)

AGread documentation built on Sept. 13, 2022, 5:06 p.m.