joineRML: formula.mjoint – R documentation

Pricing

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

Get Started for Free

Documentation

joineRML

formula.mjoint

Extract model formulae from an mjoint object

Description

Extract model formulae from an mjoint object.

Usage

## S3 method for class 'mjoint'
formula(x, process = c("Longitudinal", "Event"), k = 1, ...)

Arguments

`x`	an object inheriting from class `mjoint` for a joint model of time-to-event and multivariate longitudinal data.
`process`	character string: if `process='Longitudinal'` a fixed effects formula from the (multivariate) longitudinal sub-model is returned for the `k`-th outcome. Else, if `process='Event'`, the time-to-event model formula is returned.
`k`	integer: a number between 1 and K (the total number of longitudinal outcomes) that specifies the longitudinal outcome of interest.
`...`	additional arguments; currently none are used.

Value

An object of class "formula" which contains a symbolic model formula for the separate sub-model fixed effect terms only.

Author(s)

Graeme L. Hickey (graemeleehickey@gmail.com)

References

Pinheiro JC, Bates DM. Mixed-Effects Models in S and S-PLUS. New York: Springer Verlag; 2000.

Wulfsohn MS, Tsiatis AA. A joint model for survival and longitudinal data measured with error. Biometrics. 1997; 53(1): 330-339.

Graeme L. Hickey [cre, aut] (<https://orcid.org/0000-0002-4989-0054>), Pete Philipson [aut] (<https://orcid.org/0000-0001-7846-0208>), Andrea Jorgensen [ctb] (<https://orcid.org/0000-0002-6977-9337>), Ruwanthi Kolamunnage-Dona [aut] (<https://orcid.org/0000-0003-3886-6208>), Paula Williamson [ctb] (<https://orcid.org/0000-0001-9802-6636>), Dimitris Rizopoulos [ctb, dtc] (data/renal.rda, R/hessian.R, R/vcov.R), Alessandro Gasparini [aut] (<https://orcid.org/0000-0002-8319-7624>), Medical Research Council [fnd] (Grant number: MR/M013227/1)

Initial release

2021-04-21