Number of contributors suppression rule

The number of contributors is the number unique contributing 'charVar' codes.

Usage

NContributorsRule(
  data,
  freq,
  numVar,
  x,
  maxN = 3,
  protectZeros = FALSE,
  charVar = NULL,
  removeCodes = character(0),
  remove0 = TRUE,
  ...
)

Arguments

data

Input data as a data frame

freq

Vector of aggregate frequencies

numVar

Numerical variables. When several variables, only first is used.

x

Model matrix generated by parent function

maxN

Primary suppression when number of contributors <= maxN.

protectZeros

Suppression parameter. Only TRUE (default) is used implemented.

charVar

Variable(s) with contributor codes. When empty, unique contributor in each row is assumed. When several variables, see details.

removeCodes

Vector of codes to be omitted when counting contributors. With empty charVar row indices are assumed and conversion to integer is performed.

remove0

When set to TRUE (default), data rows in which the first numVar (if any) is zero are excluded from the count of contributors. Alternatively, remove0 can be specified as one or more variable names. In this case, all data rows with a zero in any of the specified variables are omitted from the contributor count. Specifying remove0 as variable name(s) is useful for avoiding warning when there are multiple numVar variables.

...

unused parameters

Value

List where first element is logical vector defining primary suppressions. The second element is data frame where nRule is number contributors used in rule and where nAll is similar, but without omitting codes in removeCodes.

Details

When several charVar variables, the rule is applied independently to each variable. Primary suppression in at least one case results in primary suppression in the output. It is possible to specify maxN and removeCodes independently for each charVar by using a named list as input with charVar as names. E.g. maxN = list(char1 = 3, char2 = 2).