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Convert a lower triangle matrix to a full matrix

fullPTable.Rd

Converts a lower triangle matrix to a full matrix.

Usage

fullPTable(PT)

Arguments

PT

A lower triangle matrix.

Value

A full matrix.

Details

This function is useful to convert a lower triangle matrix of p-values from a pairwise test to a full matrix. A full matrix can be passed to multcompLetters in the multcompView package to produce a compact letter display.

References

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

See also

cldList

Author

Salvatore Mangiafico, mangiafico@njaes.rutgers.edu

Examples

### Example with pairwise.wilcox.test
data(BrendonSmall)
BrendonSmall$Instructor = factor(BrendonSmall$Instructor,
                          levels = c('Brendon Small', 'Jason Penopolis',
                                     'Paula Small', 'Melissa Robbins', 
                                     'Coach McGuirk'))
P   = pairwise.wilcox.test(x = BrendonSmall$Score, g = BrendonSmall$Instructor)
#> Warning: cannot compute exact p-value with ties
#> Warning: cannot compute exact p-value with ties
#> Warning: cannot compute exact p-value with ties
#> Warning: cannot compute exact p-value with ties
#> Warning: cannot compute exact p-value with ties
#> Warning: cannot compute exact p-value with ties
PT  = P$p.value
PT
#>                 Brendon Small Jason Penopolis Paula Small
#> Jason Penopolis   0.220959330              NA          NA
#> Paula Small       0.047047043      0.17211887          NA
#> Coach McGuirk     0.002422994      0.01306027   0.2209593
PT1 = fullPTable(PT)
PT1
#>                 Brendon Small Jason Penopolis Paula Small Coach McGuirk
#> Brendon Small     1.000000000      0.22095933  0.04704704   0.002422994
#> Jason Penopolis   0.220959330      1.00000000  0.17211887   0.013060267
#> Paula Small       0.047047043      0.17211887  1.00000000   0.220959330
#> Coach McGuirk     0.002422994      0.01306027  0.22095933   1.000000000
library(multcompView)
multcompLetters(PT1)
#>   Brendon Small Jason Penopolis     Paula Small   Coach McGuirk 
#>             "a"            "ab"            "bc"             "c"