assign_df: Helper to assign degrees of freedom

In mfp2: Multivariable Fractional Polynomial Models with Extensions

Helper to assign degrees of freedom

Description

Determine the number of unique values in a variable. To be used in mfp2().

Usage

assign_df(x, df_default = 4)

Arguments

x	input matrix.
df_default	default df to be used. Default is 4.

Details

Variables with fewer than or equal to three unique values, for example, will be assigned df = 1. df = 2 will be assigned to variables with 4-5 unique values, and df = 4 will be assigned to variables with unique values greater than or equal to 6.

Value

Vector of length ncol(x) with degrees of freedom for each variable in x.

Examples

x <- matrix(1:100, nrow = 10)
assign_df(x)

mfp2 documentation built on Nov. 15, 2023, 1:06 a.m.