Contrast Functions and Jacobians

Create Contrast of Pairs

Usage

h_diff(x, y)

h_jac_diff(x, y)

h_ratio(x, y)

h_jac_ratio(x, y)

h_odds_ratio(x, y)

h_jac_odds_ratio(x, y)

eff_jacob(f)

pairwise(levels, x = levels)

against_ref(levels, ref = levels[1], x = tail(levels, -1))

custom_contrast(levels, x, y)

Arguments

x: (vector) A vector of treatment levels.
y: (vector) A vector of treatment levels.
f: (function) Function with argument x and y to compute treatment effect.
levels: (character) Levels of the treatment.
ref: (string or int) Reference level.

Value

Vector of contrasts, or matrix of jacobians.

A list of contrast object with following elements:

Index of the treatment group.
Index of the reference group. Additional attributes include levels and max_levels indicating the names of the treatment levels and the maximum number of levels.

Examples

h_diff(1:3, 4:6)
#> [1] -3 -3 -3
h_jac_ratio(1:3, 4:6)
#>           [,1]        [,2]
#> [1,] 0.2500000 -0.06250000
#> [2,] 0.2000000 -0.08000000
#> [3,] 0.1666667 -0.08333333