SPparameter-class: Class "SPparameter" - cSPADE Mining Parameters

Description Objects from the Class Slots Methods Note Author(s) See Also Examples

Description

Provides the constraint parameters for the cSPADE algorithm for mining frequent sequences.

Objects from the Class

A suitable default parameter object will be automatically created by a call to cspade. However, the values can be replaced by specifying a named list with the names (partially) matching the slot names of the SPparameter class.

Objects can be created by calls of the form new("SPparameter", support, ...).

Slots

support:

a numeric value specifying the minimum support of a sequence (default 0.1, range [0,1]).

maxsize:

an integer value specifying the maximum number of items of an element of a sequence (default 10, range > 0).

maxlen:

an integer value specifying the maximum number of elements of a sequence (default 10, range > 0).

mingap:

an integer value specifying the minimum time difference between consecutive elements of a sequence (default none, range >= 1).

maxgap:

an integer value specifying the maximum time difference between consecutive elements of a sequence (default none, range >= 0).

maxwin:

an integer value specifying the maximum time difference between any two elements of a sequence (default none, range >= 0).

Methods

coerce

signature(from = "NULL", to = "SPparameter")

coerce

signature(from = "list", to = "SPparameter")

coerce

signature(from = "SPparameter", to = "character")

coerce

signature(from = "SPparameter", to = "data.frame")

coerce

signature(from = "SPparameter", to = "list")

coerce

signature(from = "SPparameter", to = "vector")

format

signature(x = "SPparameter")

Note

User-supplied values are silently coerced to the target class, e.g. integer.

Parameters with no (default) value are not supplied to the mining algorithm, i.e., take the default values implemented there. A value can be unset using NULL.

Author(s)

Christian Buchta

See Also

Class SPcontrol, function cspade.

Examples

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## coerce from list 
p <- as(list(maxsize = NULL, maxwin = 5), "SPparameter")
p

## coerce to
as(p, "vector")
as(p, "data.frame")

arulesSequences documentation built on July 29, 2018, 5:02 p.m.