step_counter: Step Counter

In GENEAcore: Pre-Processing of 'GENEActiv' Data

Step Counter

Description

Function to calculate the number and variance of the steps in the data.

Usage

step_counter(
  step_data,
  sample_frequency = 100,
  filter_order = 2,
  boundaries = c(0.5, 5),
  Rp = 3,
  hysteresis = 0.05,
  fun = c("GENEAcount", "mean", "sd", "stepdiff")
)

stepCounter(...)

Arguments

step_data	The data to use for calculating the steps. This should be a vector of acceleration values.
sample_frequency	The sampling frequency of the data, in hertz, when calculating the step number (default 100).
filter_order	single integer, order of the Chebyshev bandpass filter, passed to argument n of cheby1.
boundaries	length 2 numeric vector specifying lower and upper bounds of Chebychev filter (default c(0.5, 5) Hz), passed to argument W of butter or cheby1.
Rp	the decibel level that the cheby filter takes, see cheby1.
hysteresis	The hysteresis applied after zero crossing. (default 100mg)
fun	character vector naming functions by which to summarize steps. "count" is an internally implemented summarizing function that returns step count.
...	Additional arguments passed to internal aggregation functions.

Value

Returns a vector with length fun.

Examples

d1 <- sin(seq(0.1, 100, 0.1)) / 2 + rnorm(1000) / 10 + 1
Steps4 <- step_counter(d1)
length(Steps4)
mean(Steps4)
sd(Steps4)
plot(Steps4)

GENEAcore documentation built on Nov. 22, 2025, 1:06 a.m.