changeTimes: Select Times as Segment Changepoints

In GENEAclassify: Segmentation and Classification of Accelerometer Data

Select Times as Segment Changepoints

Description

Trims down the number of changepoints in time series data to give segments that can reasonably be classified into discrete periods of activity. These will not normally be less than 30 seconds in duration.

Usage

changeTimes(
  time,
  intervalseconds = 30,
  changeupdown,
  changedegrees,
  mininterval = 5,
  verbose = TRUE,
  verbose_timer = TRUE
)

Arguments

time	numeric vector
intervalseconds	An integer number of seconds (usually greater than 5) during which at most one changepoint may occur (typically between 5 and 30). If intervalseconds is NA, all times will be returned. If intervalseconds <= mininterval it will be ignored (with a warning if verbose is TRUE)
changeupdown	cpt object
changedegrees	cpt object
mininterval	single numeric
verbose	single logical should all warnings be reported? (default TRUE)
verbose_timer	single logical giving a time analysis of code.

Details

The changepoint package provides tools for optimally segmenting time series data.

Value

numeric vector of times

Examples

library(changepoint)
d1 <- c(54, 30, 27, 53, 100, 204, 197)
d2 <- c(67, 64, 70, 79, 69, 60, 54)
c1 <- cpt.var(d1, penalty = "SIC", pen.value = 1e-3, method = "PELT")
c2 <- cpt.var(d2, penalty = "SIC", pen.value = 1e-3, method = "PELT")
changeTimes(time = 0:6, intervalseconds = 30, 
    changeupdown = c1, changedegrees = c2)

GENEAclassify documentation built on March 31, 2023, 9:01 p.m.