SPparameter-class {arulesSequences}R Documentation

Class "SPparameter" — cSPADE Mining Parameters

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 >= 0).
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

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

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

[Package arulesSequences version 0.1-4 Index]