Goodness of fit of a cosinor from data that has multiple collections at different timepoints or from multiple cycles. The RSS is partitioned into pure error (SSPE) and lack of fit (SSLOF). An F-test compares the SSPE and SSLOF to detect appropriateness of model.
The fitted values for each time point are:
cosinor_goodness_of_fit(object, level = 0.95, ...)
requires cosinor model generated with card::cosinor to calculate statistics.
confidence level desired
additional parameters may be needed for extensibility
f-statistic as result of goodness of fit