Changes in version 0.4.1 (2026-01-29)                  

                 Changes in version 0.3.4 (2022-02-21)                  

Minor changes

  - Added error message to extent.of.irregularity for when formula
    and/or ncutpts are not specified in the absence of scheduled visit
    times
  - made use of data.table package when lagging variables and adding
    censored rows

Bug fixes

  - extent.of.irregularity previously only allowed the time variable to
    be called "time"; this has now been fixed

                 Changes in version 0.3.3 (2020-08-24)                  

Minor changes

  - due to archival of the frailtypack package, frailty models are now
    estimated using coxph rather than frailtyPenal

                 Changes in version 0.3.2 (2020-06-24)                  

Bug fixes

  - iiw.weights failed to consider the interval between last observed
    visit and end of follow-up time when maxfu was supplied as a single
    number. This has been fixed.

                 Changes in version 0.3.1 (2020-05-23)                  

Bug fixes

  - Fixed a coding error that led extent.of.irregularity to fail when
    scheduledtimes was provided.

                 Changes in version 0.3.0 (2020-05-01)                  

Major changes

  - Added function (extent.of.irregularity) to provide graphical and
    numeric summaries of the extent of irregularity.

Minor changes

  - Added an option in the Liang function to provide as an argument a
    function computing the value of the covariates X for any subject at
    any given time t, not just the observation times.

                 Changes in version 0.2.0 (2020-01-24)                  

Major changes

  - When using lagged variable, there is an option to include a value
    for the first lagged observation within each subject.
  - A function (abacus.plot) for producing an abacus plot has been
    added.
  - The Liang model now allows for time-invariant covariates to be
    included in the visit process model.

Bug fixes

  - The documentation (examples and vignette) has been updated to use
    dosing by weight in the measurement frequency model.
  - tinvarcols can be omitted from addcensoredrows, iiwgee, and
    iiw.weights if maxfu=NULL.
  - lagfn and addcensoredrows no longer require subject identifiers to
    be numeric.