These parameters help model cases where an exponent is of interest (e.g. degree() or spline_degree()) or a product is used (e.g. prod_degree).

degree(range = c(1, 3), trans = NULL)

degree_int(range = c(1L, 3L), trans = NULL)

spline_degree(range = c(1L, 10L), trans = NULL)

prod_degree(range = c(1L, 2L), trans = NULL)

## Arguments

range A two-element vector holding the defaults for the smallest and largest possible values, respectively. A trans object from the scales package, such as scales::log10_trans() or scales::reciprocal_trans(). If not provided, the default is used which matches the units used in range. If no transformation, NULL.

## Details

degree() is helpful for parameters that are real number exponents (e.g. x^degree) whereas degree_int() is for cases where the exponent should be an integer.

The difference between degree_int() and spline_degree() is the default ranges (which is based on the context of how/where they are used).

prod_degree() is used by parsnip::mars() for the number of terms in interactions (and generates an integer).

## Examples

degree()
#> Polynomial Degree (quantitative)
#> Range: [1, 3]degree_int()
#> Polynomial Degree (quantitative)
#> Range: [1, 3]spline_degree()
#> Piecewise Polynomial Degree (quantitative)
#> Range: [1, 10]prod_degree()
#> Degree of Interaction (quantitative)
#> Range: [1, 2]