# IrregLong 0.4.1


# IrregLong 0.3.4

## 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


# IrregLong 0.3.3

## Minor changes
* due to archival of the frailtypack package, frailty models are now estimated using coxph rather than frailtyPenal


# IrregLong 0.3.2

## 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.


# IrregLong 0.3.1

## Bug fixes
* Fixed a coding error that led extent.of.irregularity to fail when scheduledtimes was provided.


# IrregLong 0.3.0


## 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.



# IrregLong 0.2.0

## 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.




