# nparACT: Non-Parametric Measures of Actigraphy Data

Computes interdaily stability (IS), intradaily variability (IV) & the relative amplitude (RA) from actigraphy data as described in van Someren et al. (1999). Additionally, it also computes L5 (i.e. the 5 hours with lowest average actigraphy amplitude) and M10 (the 10 hours with highest average amplitude) as well as the respective start times. The flex versions will also compute the L-value for a user-defined number of minutes. IS describes the strength of coupling of a rhythm to supposedly stable zeitgebers. It varies between 0 (Gaussian Noise) and 1 for perfect IS. IV describes the fragmentation of a rhythm, i.e. the frequency and extent of transitions between rest and activity. It is near 0 for a perfect sine wave, about 2 for Gaussian noise and may be even higher when a definite ultradian period of about 2 hrs is present. RA is the relative amplitude of a rhythm. Note that to obtain reliable results, actigraphy data should cover a reasonable number of days.

- Author
- Christine Blume <christine.blume@sbg.ac.at> Nayantara Santhi <n.santhi@surrey.ac.uk> Manuel Schabus <manuel.schabus@sbg.ac.at>
- Date of publication
- 2016-07-01 01:14:56
- Maintainer
- Christine Blume <christine.blume@sbg.ac.at>
- License
- GPL-2
- Version
- 0.6
- URLs

## Man pages

- nparACT_auxfunctions1
- List of Auxiliary Functions
- nparACT_auxfunctions2
- List of Auxiliary Functions
- nparACT_base
- Classic Nonparametric Actigraphy Measures for Single...
- nparACT_base_loop
- Classic Nonparametric Actigraphy Measures for Multiple...
- nparACT_flex
- Extended Nonparametric Actigraphy Measures for Single...
- nparACT_flex_loop
- Extended Nonparametric Actigraphy Measures for Multiple...
- nparACT_ISIVfunctions
- List of Functions Computing IS and IV Values
- nparACT-package
- Non-Parametric Measures of Actigraphy Data
- nparACT_RAfunctions
- List of Functions Computing RA, L and M Values and the...
- sleepstudy
- Actigraphy Data from a Sleep Study

## Files in this package

nparACT |

nparACT/NAMESPACE |

nparACT/data |

nparACT/data/sleepstudy.rda |

nparACT/R |

nparACT/R/nparACT_ISIVfunctions.R |

nparACT/R/nparACT_flex_loop.R |

nparACT/R/nparACT_base.R |

nparACT/R/nparACT_auxfunctions2.R |

nparACT/R/nparACT-internal.R |

nparACT/R/nparACT_flex.R |

nparACT/R/nparACT_auxfunctions1.R |

nparACT/R/nparACT_base_loop.R |

nparACT/R/nparACT_RAfunctions.R |

nparACT/MD5 |

nparACT/DESCRIPTION |

nparACT/man |

nparACT/man/nparACT_auxfunctions1.Rd |

nparACT/man/nparACT_flex.Rd |

nparACT/man/nparACT_base.Rd |

nparACT/man/sleepstudy.Rd |

nparACT/man/nparACT_RAfunctions.Rd |

nparACT/man/nparACT_flex_loop.Rd |

nparACT/man/nparACT_ISIVfunctions.Rd |

nparACT/man/nparACT_base_loop.Rd |

nparACT/man/nparACT-package.Rd |

nparACT/man/nparACT_auxfunctions2.Rd |