fpgrid {dosresmeta}

Grid with combinations of p for two-order fractional polynomials

Description

Computes the different combinations of p usefull for evaluating two-order fractional polynomials.

Usage

fpgrid(p = c(-2, -1, -0.5, 0, 0.5, 1, 2, 3))

Arguments

p

a numeric vector with the coefficient to be combined.

Value

A data.frame with the different combinations of p.

Author(s)

Alessio Crippa, [e-mail]

References

Royston, Patrick, and Douglas G. Altman. "Regression using fractional polynomials of continuous covariates: parsimonious parametric modelling." Applied Statistics (1994): 429-467.

Examples

grd <- fpgrid()
head(grd)