Filter: precedence relations

Filters cases based on the precedence relations between two sets of activities.

filter_precedence(eventlog, antecedents, consequents, precedence_type,
  filter_method, reverse)

# S3 method for eventlog
filter_precedence(eventlog, antecedents, consequents,
  precedence_type = c("directly_follows", "eventually_follows"),
  filter_method = c("all", "one_of", "none"), reverse = FALSE)

# S3 method for grouped_eventlog
filter_precedence(eventlog, antecedents, consequents,
  precedence_type = c("directly_follows", "eventually_follows"),
  filter_method = c("all", "one_of", "none"), reverse = FALSE)

ifilter_precedence(eventlog)

Arguments

eventlog	The dataset to be used. Should be a (grouped) eventlog object.
antecedents, consequents	The set of antecendent and consequent activities. Both are character vectors containing at leaste one activity identifier. All pairs of antecedents and consequents are turned into seperate precedence rules.
precedence_type	When directly_follows, the consequent activity should happen immediately after the antecedent activities. When eventually_follows, other events are allowed to happen in between.
filter_method	When all, only cases where all the relations are valid are preserved. When one_of, all the cases where at least one of the conditions hold are preserved. When none, none of the relations are allowed.
reverse	Logical, indicating whether the selection should be reversed.

Value

When given an eventlog, it will return a filtered eventlog. When given a grouped eventlog, the filter will be applied in a stratified way (i.e. each separately for each group). The returned eventlog will be grouped on the same variables as the original event log.

Details

In order to extract a subset of an event log which conforms with a set of precedence rules, one can use the filter_precedence method. There are two types of precendence relations which can be tested: activities that should directly follow each other, or activities that should eventually follow each other. The type can be set with the precedence type argument. Further, the filter requires a vector of one or more antecedents (containing activity labels), and one or more consequents. Finally, also a filter method argument can be set. This argument is relevant when there is more than one antecedent or consequent. In such a case, you can specify that all possible precedence combinations must be present (all), at least one of them (one of), or none (none).

Methods (by class)

• eventlog: Filter event log

• grouped_eventlog: Filter grouped event log

See also

vignette("filters", "edeaR")