cat2cat (version 0.4.7)

prune_c2c: Pruning which could be useful after the mapping process

Description

user could specify one of four methods to prune replications created in the cat2cat procedure.

Usage

prune_c2c(
  df,
  index = "index_c2c",
  column = "wei_freq_c2c",
  method = "nonzero",
  percent = 50
)

Value

`data.frame` with the same structure and possibly reduced number of rows

Arguments

df

`data.frame` like result of the `cat2cat` function for a specific period.

index

`character(1)` a column name with the `cat2cat` identifier. Should not be updated in most cases. Default `index_c2c`.

column

`character(1)` a column name with weights, default `wei_freq_c2c`.

method

`character(1)` one of four available methods: "nonzero" (default), "highest", "highest1" or "morethan".

percent

`integer(1)` from 0 to 99

Details

method - specify a method to reduce number of replications

"nonzero"

remove nonzero probabilities

"highest"

leave only highest probabilities for each subject- accepting ties

"highest1"

leave only highest probabilities for each subject - not accepting ties so always one is returned

"morethan"

leave rows where a probability is higher than value specify by percent argument

Examples

if (FALSE) {
data("occup_small", package = "cat2cat")
data("occup", package = "cat2cat")
data("trans", package = "cat2cat")

occup_old <- occup_small[occup_small$year == 2008, ]
occup_new <- occup_small[occup_small$year == 2010, ]

occup_ml <- cat2cat(
  data = list(
    old = occup_old, new = occup_new, cat_var = "code", time_var = "year"
  ),
  mappings = list(trans = trans, direction = "backward"),
  ml = list(
    data = occup_new,
    cat_var = "code",
    method = "knn",
    features = c("age", "sex", "edu", "exp", "parttime", "salary"),
    args = list(k = 10)
  )
)

prune_c2c(occup_ml$old, method = "nonzero")
prune_c2c(occup_ml$old, method = "highest")
prune_c2c(occup_ml$old, method = "highest1")
prune_c2c(occup_ml$old, method = "morethan", percent = 90)

prune_c2c(occup_ml$old, column = "wei_knn_c2c", method = "nonzero")
}