How to interpret ties

[kauedesousa]

Dear @hturner

I have been ignoring ties for a long time as we use to treat it as an error during the data collection. But now, ClimMob allows ties and some of our partners are interested in using it when necessary.

I have some questions on how to interpret it. In this example,

library("PlackettLuce")

R <- matrix(c(1, 2, 3, 0, 0,
              0, 1, 2, 3, 0,
              1, 0, 0, 2, 3,
              1, 1, 2, 1, 0,
              0, 0, 2, 2, 1,
              0, 2, 1, 2, 0), nrow = 6, byrow = TRUE)
colnames(R) <- c("apple", "banana", "orange", "pear","grape")
R <- as.rankings(R)

R

mod <- PlackettLuce(R)

summary(mod)

We have three types of ties apple = banana = pear and orange = pear and orange > banana = pear but these are registered as tie2 and tie3. Which brings some questions:

1. Why there is only two types of ties?
2. In a large set of data it will be difficult to know which tie is tie2 and tie3. Is there a way to add labels to these ties so we know which comparison it represents?

Thanks