`biglm`

and`bigglm`

(*biglm*),`feis`

(*feisr*),`gbm`

(*gbm*),`BFBayesFactor`

(*BayesFactor*),`psm`

(*rms*),`LORgee`

(*multgee*),`censReg`

(*censReg*),`ols`

(*rms*),`speedlm`

and`speedglm`

(*speedglm*),`svyolr`

(*survey*)

`is_nullmodel()`

to check if model is a null-model (intercept-only), i.e. if the conditional part of the model has no predictors.`has_intercept()`

to check if model has an intercept.

- Functions like
`find_predictors()`

or`find_terms()`

return`NULL`

for null-models (intercept-only models). Use`is_nullmodel()`

to check if your model only has an intercept-parameter (but no predictors). `get_variance()`

no longer stops if random effects variance cannot be calculated. Rather, the return-value for`$var.random`

will be`NULL`

.

`get_variance()`

now computes the full variance for mixed models with zero-inflation component.`get_priors()`

now returns the default-prior that was defined for all parameters of a class, if certain parameters have no specific prior.`find_parameters()`

gets a`flatten`

-argument, to either return results as list or as simple vector.`find_variables()`

gets a`flatten`

-argument, to either return results as list or as simple vector.

`get_data()`

did not work when model formula contained a function with namespace-prefix (like`lm(Sepal.Length ~ splines::bs(Petal.Width, df=4)`

) (#93).`get_priors()`

failed for*stanreg*-models, when one or more priors had no adjusted scales (#74).`find_random()`

failed for mixed models with multiple responses.`get_random()`

failed for*brmsfit*and*stanreg*models.`get_parameters()`

and`find_parameters()`

did not work for`MixMod`

-objects*without*zero-inflation component, when`component = "all"`

(the default).`find_formula()`

did not work for`plm`

-models without instrumental variables.`find_formula()`

returned random effects as conditional part of the formula for null-models (only intercept in fixed parts) (#87).- Fixed issue with invalid notation of instrumental-variables formula in
`felm`

-models for R-devel on Linux. - Fixed issue with
`get_data()`

for*gee*models, where incomplete cases were not removed from the data. - Fixed potential issue with
`get_data()`

for null-models (only intercept in fixed parts) from models of class`glmmTMB`

,`brmsfit`

,`MixMod`

and`rstanarm`

(#91). `find_variables()`

no longer returns (multiple)`"1"`

for random effects.

- Better handling of
`AsIs`

-variables with division-operation as dependent variables, e.g. if outcome was defined as`I(income/frequency)`

, especially for`find_response()`

and`get_data()`

. - Revised package-functions related to
`felm`

-models due to breaking changes in the*lfe*-package.

`iv_robust`

(*estimatr*),`crch`

(*crch*),`gamlss`

(*gamlss*),`lmrob`

and`glmrob`

(*robustbase*, #64),`rq`

,`rqss`

and`crq`

(*quantreg*),`rlmer`

(*robustlmm*),`mixed`

(*afex*),`tobit`

(*AER*) and`survreg`

(*survival*).

`get_variance()`

, to calculate the variance components from mixed models of class`merMod`

,`glmmTMB`

,`MixMod`

,`rlmer`

,`mixed`

,`lme`

and`stanreg`

(#52). Furthermore, convenient shortcuts to return the related components directly, like`get_variance_random()`

or`get_variance_residual()`

.`find_algorithm()`

, to get information about sampling algorithms and optimizers, and for Bayesian models also about chains and iterations (#38).`find_random_slopes()`

, which returns the names of the random slopes of mixed models.`get_priors()`

, to get a summary of priors used for a model (#39).`is_model()`

to check whether an object is a (supported) regression model (#69).`all_models_equal()`

to check whether objects are all (supported) regression models and of same class.`print_color()`

(resp.`print_colour()`

) to print coloured output to the console. Mainly implemented to reduce package dependencies.

`find_parameters()`

and`get_parameters()`

get a`parameters`

-argument for`brmsfit`

and`stanreg`

models, to allow selection of specific parameters that should be returned (#55).`find_parameters()`

and`get_parameters()`

now also return simplex parameters of monotic effects (**brms**only) and smooth terms (e.g. for gam-models).`find_terms()`

and`find_predictors()`

no longer return constants, in particular`pi`

(#26).- For
`gls`

and`lme`

objects, functions like`find_formula()`

etc. also return the correlation component (#19). `model_info`

now returns`$is_tweedie`

for models from tweedie-families.

`find_parameters()`

and`get_parameters()`

did not preserve coefficients of monotonic category-specific effects from**brmsfit**-objects.- Fixed bug that sometimes returned more elements for
`find_predictors()`

or`get_parameters()`

than requested. - Fixed bug in
`get_data()`

for**MixMod**-objects when response variable was defined via`cbind()`

. - Fixed bug in
`get_response()`

for models that used`cbind()`

with a substraction (e.g.`cbind(success, total - success)`

). In such cases, values for second column (in this example:`total`

) were the substracted values`total - success`

, not the original values from`total`

.

- Initial release.