Releases | Open Source Science

simstudy - simstudy 0.8.1

New features

Added the ability to generate data from an empirical distribution by using new functions genDataDensity and addDataDensity.
The binary and binomial distributions can now accommodate a "log" link.

Minor fix

addCorGen no longer requires all clusters to have the same size when using the rho and corstr arguments to define the correlation.
Fixed an issue that prevented functions defined outside the global namespace from being referenced in defData.

Scientific Software - Peer-reviewed - R
Published by kgoldfeld almost 2 years ago

simstudy - simstudy 0.8.0

New features

added the option to specify a customized distribution in defData and defDataAdd by specifying dist = "custom". *addPeriods now includes a new argument periodVec that allows users to designate specific measurement time periods using vector.

Minor fix

Function logisticCoefs now correctly handles double dot notation.

Scientific Software - Peer-reviewed - R
Published by kgoldfeld about 2 years ago

simstudy - simstudy 0.7.1

Breaking Changes

trtAssign with ratio=NULL used to produce 0-index values but 1-indexed values if ratio was set. This was adjusted so now both versions produce 0-indexed values. This is a potentially breaking change for existing scripts that use the generated treatment values while assuming the old behavior (e.g. using hardcoded values to filter).

New features

Function logisticCoefs determines the intercept and treatment/exposure parameter for a data generating process (based on a logistic regression model) that has a specific target population prevalence of a binary outcome, and an option to target a risk ratio, risk difference, or AUC.

Major fix

Data generation speed has been improved for very large data sets with many variables.

Scientific Software - Peer-reviewed - R
Published by kgoldfeld over 2 years ago

simstudy - Version 0.7.0

Scientific Software - Peer-reviewed - R
Published by kgoldfeld almost 3 years ago

simstudy - simstudy 0.6.0

New features

Added function blockExchangekMat and blockDecayMat. Users can now generate correlation matrices that can accommodate clustered observations over time where the within-cluster correlation in the same time period can be different from the within-cluster correlation across time periods.
Updated function genCorMat to allow generation of cluster-specific correlation matrices in case one wants to induce variability in correlation across clusters.

Major fixes

Overhauled function addCorGen to make it more flexible. It can now handle cluster-dependent data, and not just time-dependent data. In addition, performance has been dramatically improved.

Minor fixes

Fixed bug in genSpline

Scientific Software - Peer-reviewed - R
Published by kgoldfeld over 3 years ago

simstudy - simstudy 0.5.1

Minor fixes

Fixed bug in trtAssign

Scientific Software - Peer-reviewed - R
Published by kgoldfeld over 3 years ago

simstudy - simstudy 0.4.0

New features

genOrdCat now supports non-proportional odds
Added functions defRepeat and defRepeatAdd to facilitate the definition of multiple variables that share identical data definitions.

Minor improvements and fixes

Fixed bug resulting from rounding error when specifying probabilities for 'categorical' distributions.

Scientific Software - Peer-reviewed - R
Published by kgoldfeld over 4 years ago

simstudy - simstudy 0.3.0

New features

You can now use non-scalar variables with double-dot notation. See the Dynamic Data Definition Vignette.
The 'categorical' distribution now supports the variance parameter to introduce categories other than 1...n.
You can now use [trtAssign()] as a distribution with [defData()].

Minor improvements and fixes

Added CITATION
genData now warns that a set 'id' parameter will override previously defined 'id' names from the data definition.
genData now handles NULL as 'id' value in data definitions (e.g. when definitions are not created via defData etc.) by defaulting to 'id'.
Fix an error in genOrdCat when only a single adjustment variable is given but more than one new category will be created.
Fix a bug where ..variables did not work within a function using the dist="beta".

Scientific Software - Peer-reviewed - R
Published by kgoldfeld over 4 years ago

simstudy - simstudy 0.2.2

Improve documentation and vignettes.

Scientific Software - Peer-reviewed - R
Published by assignUser over 5 years ago

simstudy - simstudy 0.2.1

Add 'backports' for compatibility with R < 4.0
Fix a bug on R < 4.0 in genOrdCat
Current version is now only compatible with R version >= 3.3.0

Scientific Software - Peer-reviewed - R
Published by assignUser over 5 years ago

simstudy - simstudy 0.2.0

Deprecated Functions

Moved genCorOrdCat's functionality into genOrdCat. genCorOrdCat is now deprecated.
Renamed catProbs to genCatFormula for naming consistency. catProbs is now deprecated.

New features

Introduced a new system for formula definitions and completely reworked the underlying code. See vignette "Dynamic Data Definition".
The new function genMixFormula generates mixture formulas from different inputs.
Some simstudy functions now produce custom errors and warnings. Eventually all conditions will be replaced by the new system to make error handling easier for the user.
Added new vignettes.
Created documentation pages for:
- the release version https://kgoldfeld.github.io/simstudy/
- and development version https://kgoldfeld.github.io/simstudy/dev

Minor improvements and fixes

genCatFormula now warns if an additional category is created or probabilities are normalized.
Fixed bug in trtAssign related new ratio argument.
Fixed bug in trtAssign when strata had count of one.
defData now also checks the first row in the definition table for validity.

Scientific Software - Peer-reviewed - R
Published by assignUser over 5 years ago