Performance of Regression Models — model_performance.lm • performance

Compute indices of model performance for regression models.

Usage

# S3 method for class 'lm'
model_performance(model, metrics = "all", verbose = TRUE, ...)

Arguments

model: A model.
metrics: Can be "all", "common" or a character vector of metrics to be computed (one or more of "AIC", "AICc", "BIC", "R2", "R2_adj", "RMSE", "SIGMA", "LOGLOSS", "PCP", "SCORE"). "common" will compute AIC, BIC, R2 and RMSE.
verbose: Toggle off warnings.
...: Arguments passed to or from other methods.

Value

A data frame (with one row) and one column per "index" (see metrics).

Details

Depending on model, following indices are computed:

AIC: Akaike's Information Criterion, see ?stats::AIC
AICc: Second-order (or small sample) AIC with a correction for small sample sizes
BIC: Bayesian Information Criterion, see ?stats::BIC
R2: r-squared value, see r2()
R2_adj: adjusted r-squared, see r2()
RMSE: root mean squared error, see performance_rmse()
SIGMA: residual standard deviation, see insight::get_sigma()
LOGLOSS: Log-loss, see performance_logloss()
SCORE_LOG: score of logarithmic proper scoring rule, see performance_score()
SCORE_SPHERICAL: score of spherical proper scoring rule, see performance_score()
PCP: percentage of correct predictions, see performance_pcp()

model_performance() correctly detects transformed response and returns the "corrected" AIC and BIC value on the original scale. To get back to the original scale, the likelihood of the model is multiplied by the Jacobian/derivative of the transformation.

Examples

model <- lm(mpg ~ wt + cyl, data = mtcars)
model_performance(model)
#> # Indices of model performance
#> 
#> AIC     |    AICc |     BIC |    R2 | R2 (adj.) |  RMSE | Sigma
#> ---------------------------------------------------------------
#> 156.010 | 157.492 | 161.873 | 0.830 |     0.819 | 2.444 | 2.568

model <- glm(vs ~ wt + mpg, data = mtcars, family = "binomial")
model_performance(model)
#> # Indices of model performance
#> 
#> AIC    |   AICc |    BIC | Tjur's R2 |  RMSE | Sigma | Log_loss | Score_log
#> ---------------------------------------------------------------------------
#> 31.298 | 32.155 | 35.695 |     0.478 | 0.359 | 1.000 |    0.395 |   -14.903
#> 
#> AIC    | Score_spherical |   PCP
#> --------------------------------
#> 31.298 |           0.095 | 0.743