| modify_cnt_ptable {ptable} | R Documentation |
Modify a ptable suitable for frequency count variables
Description
modify_cnt_ptable() is a function to modify the standard
ptable for count variables that is generated by create_cnt_ptable() or
within the 'cellKey'-package. The noise intervals in
the standard ptable are ordered from -D to D. A modified ptable still has
the same properties as the standard ptable but can ensure a higher
protection of perturbed frequency tables since the noise probabilities are
split and the intervals are rearranged.
Usage
modify_cnt_ptable(input, threshold = 0.2, seed = NULL)
Arguments
input |
The ptable-object of class 'ptable', 'ck_params' or data.table |
threshold |
The maximum width of the intervals after modification |
seed |
A seed for the rearrangement of the split intervals |
Details
In a first step, the noise probabilities larger than a threshold value will be split. Then, the split noise probabilities are randomly rearranged using a seed (the modifications is replicable). Finally, the intervals of the ptable will be adjusted.
Value
Returns an object of class ptable or a data.table.
Author(s)
Tobias Enderle, tobias.enderle@destatis.de
See Also
Examples
# Original ptable
ptab <- create_cnt_ptable(3, 1)
# modified ptable
ptab_mod <- modify_cnt_ptable(ptab, 0.3, seed = 5467)
ptab_mod@pTable