discrim_quad: Quadratic discriminant analysis

In parsnip: A Common API to Modeling and Analysis Functions

Quadratic discriminant analysis

Description

discrim_quad() defines a model that estimates a multivariate distribution for the predictors separately for the data in each class (usually Gaussian with separate covariance matrices). Bayes' theorem is used to compute the probability of each class, given the predictor values. This function can fit classification models.

\Sexpr[stage=render,results=rd]{parsnip:::make_engine_list("discrim_quad")}

More information on how parsnip is used for modeling is at https://www.tidymodels.org/.

Usage

discrim_quad(
  mode = "classification",
  regularization_method = NULL,
  engine = "MASS"
)

Arguments

mode	A single character string for the type of model. The only possible value for this model is "classification".
regularization_method	A character string for the type of regularized estimation. Possible values are: "diagonal", "shrink_cov", and "shrink_mean" (sparsediscrim engine only).
engine	A single character string specifying what computational engine to use for fitting.

Details

This function only defines what type of model is being fit. Once an engine is specified, the method to fit the model is also defined. See set_engine() for more on setting the engine, including how to set engine arguments.

The model is not trained or fit until the fit() function is used with the data.

Each of the arguments in this function other than mode and engine are captured as quosures. To pass values programmatically, use the injection operator like so:

value <- 1
discrim_quad(argument = !!value)

References

https://www.tidymodels.org, Tidy Modeling with R, searchable table of parsnip models

See Also

\Sexpr[stage=render,results=rd]{parsnip:::make_seealso_list("discrim_quad")}

parsnip documentation built on Aug. 18, 2023, 1:07 a.m.