Compute Krippendorff's Surrogacy

Source: R/surrogacy.R

Similar input and warnings as [replicability()]. TODO(julien): figure out how to merge both functions in the same help page.

surrogacy(
  coders,
  standard,
  unit_from = "unit",
  measurement_from = "measurement",
  frequency_from = NULL,
  return_by_unit = FALSE
)

Arguments

coders

`data.table` containing the coders.
standard

`data.table` containing the standard.
unit_from

Name of the column containing the unit ID
measurement_from

Name of the column containing the measurements
frequency_from

(Optional) Name of the column containing the frequencies, *if* the data is in the "aggregated" form described above.
return_by_unit

(default FALSE) If TRUE, return a data.table of per-unit contributions.

Value

surrogacy

Krippendorff's Alpha surrogacy index

De

Expected disagreement

Do

Overall observed disagreement accross all units

by_unit

(Only if return_by_unit = TRUE) Per-unit contributions