Multiple Component Cosinor Features
Extract the special/global features of a multiple component cosinor. In a multiple component model, there are specific parameters that are not within the model itself, but must be extracted from the model fit. When extracted, can be used to improve the plot of a multiple component cosinor. However, this is only possible if the cosinor is harmonic (see details). For single-component models, the orthophase is the same as the acrophase and the global amplitude
Global Amplitude (Ag) = the overall amplitude is defined as half the difference between the peak and trough values
Orthophase (Po) = the lag until the peak time
Bathyphase (Pb) = the lag until the trough time
cosinor_features(object, population = TRUE, ...)
object |
Model of class |
population |
If the object is a population cosinor, should the features be calculated for the individual cosinors or for the population-cosinors. Default is TRUE. This has no effect on "Individual" cosinor objects.
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... |
For extensibility |
These calculations can only occur if the periods of the cosinor are harmonic - as in, the longest period is a integer multiple of the smallest period (known as the fundamental frequency). Otherwise, these statistics are not accurate or interpretable.
When returning the cosinor features for a single model, will return an object of class list. When returning the cosinor features for every individual in a population cosinor, will return an object of class tibble.
data(twins) model <- cosinor(rDYX ~ hour, twins, c(24, 8), "patid") results <- cosinor_features(model, population = FALSE) head(results)
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