Summary method for objects from class ‘pram’ to provide information about transitions.
# S3 method for class 'pram'
summary(object, ...)
The summary of object from class ‘pram’.
Shows various information about the transitions.
Templ, M. Statistical Disclosure Control for Microdata Using the R-Package sdcMicro, Transactions on Data Privacy, vol. 1, number 2, pp. 67-85, 2008. http://www.tdp.cat/issues/abs.a004a08.php
data(free1)
x <- as.factor(free1[,"MARSTAT"])
x2 <- pram(x)
x2
#> Number of changed observations:
#> - - - - - - - - - - -
#> x != x_pram : 144 (3.6%)
summary(x2)
#> Variable: x
#>
#> ----------------------
#>
#> Frequencies in original and perturbed data:
#> x 1 2 3 4 NA
#> <char> <char> <char> <char> <char> <char>
#> 1: Original Frequencies 2547 162 171 1120 0
#> 2: Frequencies after Perturbation 2551 164 170 1115 0
#>
#> Transitions:
#> transition Frequency
#> <char> <int>
#> 1: 1 --> 1 2526
#> 2: 1 --> 2 1
#> 3: 1 --> 3 2
#> 4: 1 --> 4 18
#> 5: 2 --> 1 1
#> 6: 2 --> 2 138
#> 7: 2 --> 3 3
#> 8: 2 --> 4 20
#> 9: 3 --> 1 3
#> 10: 3 --> 2 5
#> 11: 3 --> 3 139
#> 12: 3 --> 4 24
#> 13: 4 --> 1 21
#> 14: 4 --> 2 20
#> 15: 4 --> 3 26
#> 16: 4 --> 4 1053
#>