ActCR: ActCosinor – R documentation

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ActCosinor

Cosinor Model for Circadian Rhythmicity

A parametric approach to study circadian rhythmicity assuming cosinor shape.

ActCosinor(x, window = 1)

`x`	`vector` vector of dimension n*1440 which reprsents n days of 1440 minute activity data
`window`	The calculation needs the window size of the data. E.g window = 1 means each epoch is in one-minute window.

A list with elements

`mes`	MESOR which is short for midline statistics of rhythm, which is a rhythm adjusted mean. This represents mean activity level.
`amp`	amplitude, a measure of half the extend of predictable variation within a cycle. This represents the highest activity one can achieve.
`acro`	acrophase, a meaure of the time of the overall high values recurring in each cycle. Here it has a unit of radian. This represents time to reach the peak.
`acrotime`	acrophase in the unit of the time (hours)
`ndays`	Number of days modeled

Cornelissen, G. Cosinor-based rhythmometry. Theor Biol Med Model 11, 16 (2014). https://doi.org/10.1186/1742-4682-11-16

count1 = c(t(example_activity_data$count[1,-c(1,2)]))
cos_coeff = ActCosinor(x = count1, window = 1)

Extract Circadian Rhythms Metrics from Actigraphy Data

v0.2.0

GPL-3

Authors

Junrui Di [aut, cre], Vadim zipunnikov [aut]

Initial release