create_rolling_window: Rolling window

In KiranLDA/PAMLr: Suite Of Functions For Manipulating Pressure, Activity, Magnetism, Temperature And Light Data In R

Rolling window

Description

This function merges all the data to a given output resolution and then progresses along the timeseries and creates summary statistics within a pre-defined time window. Can interpolate or not. Interpolations is only recommended if the analysis cannot handle NAs and if the window is smaller than the data (e.g. magnetic) with the worst temporal resolution

Usage

create_rolling_window(
  dta,
  interp = TRUE,
  resolution_out = 15,
  window = 120,
  units = "mins"
)

Arguments

dta	PAM data to be used in the analysis
interp	By default TRUE. Whether or not to interpolate NAs in dataset that the rollapply is used on.
resolution_out	Temporal resolution of output dataset. By defaukt 15 mins. Must be in minutes unless the units are changed
window	Window over which to apply the rolling window. By defaukt 120 mins. Equivalent to zoo::rollapply(,width = window,) Must be in minutes unless the units are changed
units	By default"mins", but also supports "hours" and "secs"

Value

a dataframe of derived metrics including the median, standard deviation, minimum, maximum, cumulative difference and range over the period

Examples

data(swift)
PAM_data = swift

# crop the data to get rid of no good periods
start = as.POSIXct("2016-09-01","%Y-%m-%d", tz="UTC")
end = as.POSIXct("2017-04-21","%Y-%m-%d", tz="UTC")
PAM_data = create_crop(PAM_data, start, end)

TOclassify = create_rolling_window(dta = list(pressure = PAM_data$pressure,
                                acceleration = PAM_data$acceleration),
                     resolution_out = 60 ,
                     window = 24*60)

KiranLDA/PAMLr documentation built on March 6, 2023, 1:40 p.m.