View source: R/ols-stepaic-forward-regression.R

ols_step_forward_sbic | R Documentation |

Build regression model from a set of candidate predictor variables by entering predictors based on sawa bayesian criterion, in a stepwise manner until there is no variable left to enter any more.

```
ols_step_forward_sbic(model, ...)
## Default S3 method:
ols_step_forward_sbic(
model,
include = NULL,
exclude = NULL,
progress = FALSE,
details = FALSE,
...
)
## S3 method for class 'ols_step_forward_sbic'
plot(x, print_plot = TRUE, details = TRUE, digits = 3, ...)
```

`model` |
An object of class |

`...` |
Other arguments. |

`include` |
Character or numeric vector; variables to be included in selection process. |

`exclude` |
Character or numeric vector; variables to be excluded from selection process. |

`progress` |
Logical; if |

`details` |
Logical; if |

`x` |
An object of class |

`print_plot` |
logical; if |

`digits` |
Number of decimal places to display. |

List containing the following components:

`model` |
final model; an object of class |

`metrics` |
selection metrics |

`others` |
list; info used for plotting and printing |

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

Other forward selection procedures:
`ols_step_forward_adj_r2()`

,
`ols_step_forward_aic()`

,
`ols_step_forward_p()`

,
`ols_step_forward_r2()`

,
`ols_step_forward_sbc()`

```
# stepwise forward regression
model <- lm(y ~ ., data = surgical)
ols_step_forward_sbic(model)
# stepwise forward regression plot
k <- ols_step_forward_sbic(model)
plot(k)
# selection metrics
k$metrics
# extract final model
k$model
# include or exclude variables
# force variable to be included in selection process
ols_step_forward_sbic(model, include = c("age"))
# use index of variable instead of name
ols_step_forward_sbic(model, include = c(5))
# force variable to be excluded from selection process
ols_step_forward_sbic(model, exclude = c("liver_test"))
# use index of variable instead of name
ols_step_forward_sbic(model, exclude = c(4))
# include & exclude variables in the selection process
ols_step_forward_sbic(model, include = c("age"), exclude = c("liver_test"))
# use index of variable instead of name
ols_step_forward_sbic(model, include = c(5), exclude = c(4))
```

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