shrinkage_correlation: Parameters for possible engine parameters for sda models

In dials: Tools for Creating Tuning Parameter Values

Parameters for possible engine parameters for sda models

Description

These functions can be used to optimize engine-specific parameters of sda::sda() via parsnip::discrim_linear().

Usage

shrinkage_correlation(range = c(0, 1), trans = NULL)

shrinkage_variance(range = c(0, 1), trans = NULL)

shrinkage_frequencies(range = c(0, 1), trans = NULL)

diagonal_covariance(values = c(TRUE, FALSE))

Arguments

range	A two-element vector holding the defaults for the smallest and largest possible values, respectively. If a transformation is specified, these values should be in the transformed units.
trans	A trans object from the scales package, such as scales::transform_log10() or scales::transform_reciprocal(). If not provided, the default is used which matches the units used in range. If no transformation, NULL.
values	A vector of possible values (TRUE or FALSE).

Details

These functions map to sda::sda() arguments via:

• shrinkage_correlation() to lambda

• shrinkage_variance() to lambda.var

• shrinkage_frequencies() to lambda.freqs

• diagonal_covariance() to diagonal

Value

For the functions, they return a function with classes "param" and either "quant_param" or "qual_param".

dials documentation built on Aug. 9, 2025, 1:06 a.m.