broom (version 0.4.0)

binWidth_tidiers: Tidy a binWidth object

Description

Tidy a binWidth object from the "binGroup" package, which calculates the expected width of a confidence interval from a binomial test.

Usage

## S3 method for class 'binWidth':
tidy(x, ...)

Arguments

x

A "binWidth" object

...

Extra arguments (not used)

Value

• A one-row data.frame with columns:
• ci.width
  Expected width of confidence interval
• alternative
  Alternative hypothesis
• p
  True proportion
• n
  Total sample size

Examples

if (require("binGroup", quietly = TRUE)) {
    bw <- binWidth(100, .1)
    bw
    tidy(bw)

    library(dplyr)
    d <- expand.grid(n = seq(100, 800, 100),
                     p = .5,
                     method = c("CP", "Blaker", "Score", "Wald"),
                     stringsAsFactors = FALSE) %>%
        group_by(n, p, method) %>%
        do(tidy(binWidth(.$n, .$p, method = .$method)))

    library(ggplot2)
    ggplot(d, aes(n, ci.width, color = method)) +
        geom_line() +
        xlab("Total Observations") +
        ylab("Expected CI Width")
}