broom (version 0.4.5)

kappa_tidiers: Tidy a kappa object from a Cohen's kappa calculation

Description

Tidy a "kappa" object, from the cohen.kappa function in the psych package. This represents the agreement of two raters when using nominal scores.

Usage

# S3 method for kappa
tidy(x, ...)

Arguments

x

An object of class "kappa"

...

extra arguments (not used)

Value

A data.frame with columns

type

Either "weighted" or "unweighted"

estimate

The estimated value of kappa with this method

conf.low

Lower bound of confidence interval

conf.high

Upper bound of confidence interval

Details

Note that the alpha of the confidence interval is determined when the cohen.kappa function is originally run.

See Also

cohen.kappa

Examples

# NOT RUN {
library(psych)

rater1 = 1:9
rater2 = c(1, 3, 1, 6, 1, 5, 5, 6, 7)
ck <- cohen.kappa(cbind(rater1, rater2))

tidy(ck)

# graph the confidence intervals
library(ggplot2)
ggplot(tidy(ck), aes(estimate, type)) +
    geom_point() +
    geom_errorbarh(aes(xmin = conf.low, xmax = conf.high))

# }