ranktable function

Convert rank tables to and from order tables

Convert rank tables (as generated by rrank(), for example) to order tables like the formula 1 tables; and convert back. Print and summary methods for rank tables are documented here. See also ordertable.Rd.

ranktable_to_ordertable(xrank)
ordertable_to_ranktable(xorder)
wikitable_to_ranktable(wikitable, strict=FALSE)
## S3 method for class 'ranktable'
summary(object, ...)
ranktable_to_printable_object(x)
## S3 method for class 'ranktablesummary'
print(x,...)

Arguments

• x,xrank,object: A rank table, an object with class ranktable, for example the value of rrank()

• xorder,wikitable: Order tables. Argument wikitable

  refers to a generalized order table which can include entries such as DNF signifying did not finish.

• strict: Controls for wikitable_to_ranktable()

• ...: Further arguments (currently ignored)

Details

Function ranktable_to_ordertable() is trivial; ordertable_to_ranktable() less so. The prototype for order tables would be skating_table.

Function ordertable_to_ranktable(x) checks for each column being a permutation of seq_len(nrow(x)) and, if not, it stops. In particular, DNF entries are out of scope. To convert order tables such as F1_table_2017, which include DNF

entries, use wikitable_to_ranktable() or ordertable2supp()

to produce a likelihood function.

Function ranktable_to_printable_object() is a helper function that coerces a ranktable object to a matrix that prints nicely.

The print method is discussed in inst/ordertable_to_ranktable.Rmd.

Returns

An order table or rank table

Author(s)

Robin K. S. Hankin

See Also

rrank, ordertable2supp

Examples

p <- (5:1)/15
names(p) <- letters[1:5]
xrank <- rrank(12,p,rnames=month.abb)
xorder <- ranktable_to_ordertable(xrank)

## Can convert back and forth:
identical(xrank,ordertable_to_ranktable(ranktable_to_ordertable(xrank)))

# maxp(ordertable2supp(xorder))  # should be close to p
ordertable_to_ranktable(skating_table)

# convert a rank table to a support function:
rank_likelihood(wikitable_to_ranktable(volvo_table))