Tidy summarizes information about the components of a model. A model component might be a single term in a regression, a single hypothesis, a cluster, or a class. Exactly what tidy considers to be a model component varies across models but is usually self-evident. If a model has several distinct types of components, you will need to specify which components to return.
# S3 method for pairwise.htest
tidy(x, ...)
A pairwise.htest
object such as those returned from
stats::pairwise.t.test()
or stats::pairwise.wilcox.test()
.
Additional arguments. Not used. Needed to match generic
signature only. Cautionary note: Misspelled arguments will be
absorbed in ...
, where they will be ignored. If the misspelled
argument has a default value, the default value will be used.
For example, if you pass conf.lvel = 0.9
, all computation will
proceed using conf.level = 0.95
. Additionally, if you pass
newdata = my_tibble
to an augment()
method that does not
accept a newdata
argument, it will use the default value for
the data
argument.
Note that in one-sided tests, the alternative hypothesis of each test can be stated as "group1 is greater/less than group2".
Note also that the columns of group1 and group2 will always be a factor, even if the original input is (e.g.) numeric.
stats::pairwise.t.test()
, stats::pairwise.wilcox.test()
,
tidy()
Other htest tidiers:
augment.htest()
,
tidy.htest()
,
tidy.power.htest()
A tibble::tibble()
with columns:
First group being compared.
Second group being compared.
The two-sided p-value associated with the observed statistic.
# feel free to ignore the following line—it allows {broom} to supply
# examples without requiring the data-supplying package to be installed.
if (requireNamespace("modeldata", quietly = TRUE)) {
attach(airquality)
Month <- factor(Month, labels = month.abb[5:9])
ptt <- pairwise.t.test(Ozone, Month)
tidy(ptt)
library(modeldata)
data(hpc_data)
attach(hpc_data)
ptt2 <- pairwise.t.test(compounds, class)
tidy(ptt2)
tidy(pairwise.t.test(compounds, class, alternative = "greater"))
tidy(pairwise.t.test(compounds, class, alternative = "less"))
tidy(pairwise.wilcox.test(compounds, class))
}
#> # A tibble: 6 × 3
#> group1 group2 p.value
#> <chr> <chr> <dbl>
#> 1 F VF 4.85e-32
#> 2 M VF 2.41e-66
#> 3 M F 1.45e-23
#> 4 L VF 1.90e-77
#> 5 L F 1.28e-42
#> 6 L M 6.84e- 9