View source: R/seqeconstraint.R

seqeconstraint | R Documentation |

Function used to set time constraints and the counting method in methods (`seqe...`

) for event sequences such as `seqefsub`

for searching frequent subsequences or `seqeapplysub`

for checking occurrences of subsequences.

seqeconstraint(max.gap = -1, window.size = -1, age.min = -1, age.max = -1, age.max.end = -1, count.method = 1, maxGap, windowSize, ageMin, ageMax, ageMaxEnd, countMethod)

`max.gap` |
The maximum time gap between two events |

`window.size` |
The maximum time span accepted for subsequences |

`age.min` |
Minimal start time position allowed for subsequences. Ignored when equal to -1 (default). |

`age.max` |
Maximal start time position allowed for subsequences. Ignored when equal to -1 (default). |

`age.max.end` |
Maximal end time position allowed for subsequences. Ignored when equal to -1 (default). |

`count.method` |
By default, subsequences are counted only
one time by sequence ( |

`maxGap` |
Deprecated. Use |

`windowSize` |
Deprecated. Use |

`ageMin` |
Deprecated. Use |

`ageMax` |
Deprecated. Use |

`ageMaxEnd` |
Deprecated. Use |

`countMethod` |
Deprecated. Use |

`max.gap`

, `window.size`

, `age.min`

, `age.max`

and
`age.max.end`

. If so, two events should not be separated by more
than `max.gap`

and the whole subsequence should not exceed a
`window.size`

time span.
The other parameters specify the start and end age of the subsequence,
it should start between `age.min`

and `age.max`

and finish
before `age.max.end`

.
Parameters `age.min`

, `age.max`

and `age.max.end`

are
interpreted as the number of positions (time units) from the beginning
of the sequence.

There are 5 options for the `count.method`

argument. (1) By default,
the count is the number of sequences that contain the subsequence (`"COBJ"`

method).
Alternatives are (2) `"CDIST_O"`

(counts all distinct occurrences in each sequence including possibly overlapping occurrences, i.e., occurrences sharing a same event occurrence), (3) `"CWIN"`

(number of slidden windows of length `window.size`

that contain an occurrence of the subsequence),
(4) `"CMINWIN"`

(number of minimal windows of occurrence) and (5) `"CDIST"`

(distinct occurrences without event occurrences overlap). See
references.

A constraint object containing one item per constraint type.

Matthias Studer, Nicolas S. Müller and Reto Bürgin (alternative counting methods) (with Gilbert Ritschard for the help page)

Joshi, Mahesh V., George Karypis, and Vipin Kumar (2001) A Universal Formulation of
Sequential Patterns *Proceedings of the KDD'2001 Workshop on
Temporal Data Mining*, San Francisco.

Ritschard, G., A. Gabadinho, N.S. Müller and M. Studer (2008), Mining event sequences: A social science perspective, *International Journal of Data Mining, Modelling and Management, IJDMMM*, 1(1), 68-90.

`seqefsub`

, `seqeapplysub`

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