tolongformat: Transforms Data Frame into Long Format Design
Description
Data frame with one line per event gets transformed to a data
frame in a format that has as many rows as each subject has transitions for
which he/she is at risk.
Usage
tolongformat(d, mpl)
Arguments
d
simulated data-set as the return object from the
simeventhistories function.
mpl
model parameter list.
Value
A list of data-sets.
Details
In the format of the input data frame object d, the data
are not yet suitable for a stratified Cox partial likelihood analysis:
we need the data frame in a format that has many rows as each subject
has transitions for which he/she is at risk.
We will denote this as 'long format' in reference to the literature on
multi-state model software, as for example on page 5 in de Wreede et al (2011).
References
Liesbeth C. de Wreede, Marta Fiocco, Hein Putter (2011)
mstate: An R Package for the Analysis of Competing Risks and Multi-State Models.
Journal of Statistical Software, 38(7), 1-30. URL http://www.jstatsoft.org/v38/i07/.