rcompanion (version 2.2.2)

cldList: Compact letter display for lists of comparisons

Description

Produces a compact letter display (cld) from pairwise comparisons that were summarized in a table of comparisons

Usage

cldList(formula = NULL, data = NULL, comparison = NULL,
  p.value = NULL, threshold = 0.05, print.comp = FALSE,
  remove.space = TRUE, remove.equal = TRUE, remove.zero = TRUE,
  swap.colon = TRUE, swap.vs = FALSE, ...)

Arguments

formula

A formula indicating the variable holding p-values and the variable holding the comparisons. e.g. P.adj ~ Comparison.

data

The data frame to use.

comparison

A vector of text describing comparisons, with each element in a form similar to "Treat.A - Treat.B = 0". Spaces and "=" and "0" are removed by default

p.value

A vector of p-values corresponding to the comparisons in the comparison argument

threshold

The alpha value. That is, the p-value below which the comparison will be considered significant

print.comp

If TRUE, prints out a data frame of the modified text of the comparisons. Useful for debugging

remove.space

If TRUE, removes spaces from the text of the comparisons

remove.equal

If TRUE, removes "=" from the text of the comparisons

remove.zero

If TRUE, removes "0" from the text of the comparisons

swap.colon

If TRUE, swaps ":" with "-" in the text of the comparisons

swap.vs

If TRUE, swaps "vs" with "-" in the text of the comparisons

...

Additional arguments passed to multcompLetters

Value

A data frame of group names, group separation letters, and monospaced separtions letters

Details

The input should include either formula and data; or comparison and p.value.

This function relies upon the multcompLetters function in the multcompView package. The text for the comparisons passed to multcompLetters should be in the form "Treat.A-Treat.B". Currently cldList removes spaces, equal signs, and zeros, by default, and so can use text in the form e.g. "Treat.A - Treat.B = 0". It also changes ":" to "-", and so can use text in the form e.g. "Treat.A : Treat.B".

References

http://rcompanion.org/handbook/F_08.html

Examples

# NOT RUN {
data(PoohPiglet)
PoohPiglet$Speaker = factor(PoohPiglet$Speaker,
                            levels=c("Pooh", "Tigger", "Piglet"))
library(FSA)
DT = dunnTest(Likert ~ Speaker,
              data=PoohPiglet,
              method="bh")
DT = DT$res
DT
cldList(P.adj ~ Comparison,
        data      = DT,
        threshold = 0.05)

# }