insight 0.3.0

New supported model classes

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.