FirstOrder
Package
weka.filters.unsupervised.attribute
Synopsis
This instance filter takes a range of N numeric attributes and replaces them with N-1 numeric attributes, the values of which are the difference between consecutive attribute values from the original instance. eg:
Original attribute values
0.1, 0.2, 0.3, 0.1, 0.3
New attribute values
0.1, 0.1, -0.2, 0.2
The range of attributes used is taken in numeric order. That is, a range spec of 7-11,3-5 will use the attribute ordering 3,4,5,7,8,9,10,11 for the differences, NOT 7,8,9,10,11,3,4,5.
Options
The table below describes the options available for FirstOrder.
Option |
Description |
|---|---|
attributeIndices |
Specify range of attributes to act on. This is a comma separated list of attribute indices, with "first" and "last" valid values. Specify an inclusive range with "-". E.g: "first-3,5,6-10,last". |
Capabilities
The table below describes the capabilites of FirstOrder.
Capability |
Supported |
|---|---|
Class |
Empty nominal class, Binary class, Missing class values, String class, No class, Date class, Relational class, Numeric class, Unary class, Nominal class |
Attributes |
Numeric attributes, Relational attributes, Unary attributes, Missing values, Empty nominal attributes, Nominal attributes, String attributes, Binary attributes, Date attributes |
Min # of instances |
0 |