se_param {CAISEr}R Documentation

Parametric standard errors

Description

Calculates the standard errors of a given statistic using parametric formulas

Usage

se_param(Xk, dif = "simple", comparisons = "all.vs.all", ...)

Arguments

Xk

list object where each position contains a vector of observations of algorithm k on a given problem instance.

dif

name of the difference for which the SEs are desired. Accepts "perc" (for percent differences) or "simple" (for simple differences)

comparisons

standard errors to be calculated. Accepts "all.vs.first" (in which cases the first object in algorithms is considered to be the reference algorithm) or "all.vs.all" (if there is no reference and all pairwise SEs are desired).

...

other parameters (used only for compatibility with calls to se_boot(), unused in this function)

Value

Data frame containing, for each pair of interest, the estimated difference (column "Phi") and the sample standard error (column "SE")

References

Author(s)

Felipe Campelo (fcampelo@ufmg.br, f.campelo@aston.ac.uk)

Examples

# three vectors of normally distributed observations
set.seed(1234)
Xk <- list(rnorm(10, 5, 1),  # mean = 5, sd = 1,
           rnorm(20, 10, 2), # mean = 10, sd = 2,
           rnorm(20, 15, 5)) # mean = 15, sd = 3

se_param(Xk, dif = "simple", comparisons = "all.vs.all")
se_param(Xk, dif = "perc", comparisons = "all.vs.first")
se_param(Xk, dif = "perc", comparisons = "all.vs.all")

[Package CAISEr version 1.0.16 Index]