embryogrowth (version 10.2)

movement: Analyze movement recorded within a nest with an accelerometer datalogger

Description

This function is used to evaluate significant movement within a nest.
The "quiet" period is the period without any expected move. It is used as a reference to detect the period with significant movements.
It returns a data.frame with the columns:
"Time", "x", "y", "z",
"mvt", "mvt_standardized", "peakmvt", "running", "mvt_MA_standardized",
"mvt_2", "mvt_2_standardized", "peakmvt_2", "running_2", "mvt_2_MA_standardized".
mvt and mvt_2 are two different methods. Often mvt_2 is better to descrobe movments.

Usage

movement(
  x = stop("data.frame must be provided"),
  col.time = "Time",
  col.x = "x",
  col.y = "y",
  col.z = "z",
  DaysQuiet = 40,
  SkipDays = 1,
  k = 4,
  Windowsize = 15
)

Value

The function will return a data.frame

Arguments

x

A data.frame with 4 columns, one for time and three for x, y, and z position

col.time

Name of the column with time

col.x

Name of the column with x positions

col.y

Name of the column with y positions

col.z

Name of the column with z positions

DaysQuiet

Number of days in quiet period

SkipDays

Number of days to skip before being in quiet mode

k

Factor to multiply SD to prevent false positive detection

Windowsize

Number of records used for moving average

Author

Marc Girondot

Details

movement is a function that permits to analyze movement datalogger

References

11893embryogrowth

See Also

Other Data loggers utilities: calibrate.datalogger(), uncertainty.datalogger()

Examples

if (FALSE) {
library(embryogrowth)
mv <- movement(x=dataf, 
               col.time="Time", 
               col.x="x", col.y="y", col.z="z")
}