|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||
java.lang.Objectweka.filters.Filter
weka.filters.unsupervised.attribute.FirstOrder
public class FirstOrder
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.
-R <index1,index2-index4,...> Specify list of columns to take the differences between. First and last are valid indexes. (default none)
| Constructor Summary | |
|---|---|
FirstOrder()
|
|
| Method Summary | |
|---|---|
java.lang.String |
attributeIndicesTipText()
Returns the tip text for this property |
java.lang.String |
getAttributeIndices()
Get the current range selection |
Capabilities |
getCapabilities()
Returns the Capabilities of this filter. |
java.lang.String[] |
getOptions()
Gets the current settings of the filter. |
java.lang.String |
getRevision()
Returns the revision string. |
java.lang.String |
globalInfo()
Returns a string describing this filter |
boolean |
input(Instance instance)
Input an instance for filtering. |
java.util.Enumeration |
listOptions()
Returns an enumeration describing the available options. |
static void |
main(java.lang.String[] argv)
Main method for testing this class. |
void |
setAttributeIndices(java.lang.String rangeList)
Set which attributes are to be deleted (or kept if invert is true) |
void |
setAttributeIndicesArray(int[] attributes)
Set which attributes are to be deleted (or kept if invert is true) |
boolean |
setInputFormat(Instances instanceInfo)
Sets the format of the input instances. |
void |
setOptions(java.lang.String[] options)
Parses a given list of options. |
| Methods inherited from class weka.filters.Filter |
|---|
batchFilterFile, batchFinished, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public FirstOrder()
| Method Detail |
|---|
public java.lang.String globalInfo()
public java.util.Enumeration listOptions()
listOptions in interface OptionHandler
public void setOptions(java.lang.String[] options)
throws java.lang.Exception
-R <index1,index2-index4,...> Specify list of columns to take the differences between. First and last are valid indexes. (default none)
setOptions in interface OptionHandleroptions - the list of options as an array of strings
java.lang.Exception - if an option is not supportedpublic java.lang.String[] getOptions()
getOptions in interface OptionHandlerpublic Capabilities getCapabilities()
getCapabilities in interface CapabilitiesHandlergetCapabilities in class FilterCapabilities
public boolean setInputFormat(Instances instanceInfo)
throws java.lang.Exception
setInputFormat in class FilterinstanceInfo - an Instances object containing the input instance
structure (any instances contained in the object are ignored - only the
structure is required).
UnsupportedAttributeTypeException - if any of the
selected attributes are not numeric
java.lang.Exception - if only one attribute has been selected.public boolean input(Instance instance)
input in class Filterinstance - the input instance
java.lang.IllegalStateException - if no input format has been defined.public java.lang.String attributeIndicesTipText()
public java.lang.String getAttributeIndices()
public void setAttributeIndices(java.lang.String rangeList)
throws java.lang.Exception
rangeList - a string representing the list of attributes. Since
the string will typically come from a user, attributes are indexed from
1. java.lang.Exception - if an invalid range list is supplied
public void setAttributeIndicesArray(int[] attributes)
throws java.lang.Exception
attributes - an array containing indexes of attributes to select.
Since the array will typically come from a program, attributes are indexed
from 0.
java.lang.Exception - if an invalid set of ranges is suppliedpublic java.lang.String getRevision()
getRevision in interface RevisionHandlergetRevision in class Filterpublic static void main(java.lang.String[] argv)
argv - should contain arguments to the filter: use -h for help
|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||