shared
Class TableCategorizer

java.lang.Object
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  +--shared.Globals
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        +--shared.Categorizer
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              +--shared.TableCategorizer

public class TableCategorizer

extends Categorizer

A TableCategorizer consists of a table of all possible instances. Instances are categorized according to label if they are found; otherwise the default category is returned. The tiebreaking order is used to break ties if multiple instances match. Assumes LabelledInstanceInfo has label of type NominalAttrInfo and all instances must be labelled.

Field Summary

protected InstanceHashTable

hashTable Hashtable of Instances used in this categorizer.

Fields inherited from class shared.Categorizer

CATEGORIZER_ID_BASE, CLASS_ATTR_CATEGORIZER, CLASS_ATTR_EQ_CATEGORIZER, CLASS_ATTR_SUBSET_CATEGORIZER, CLASS_BAD_CATEGORIZER, CLASS_BAGGING_CATEGORIZER, CLASS_CASCADE_CATEGORIZER, CLASS_CLUSTER_CATEGORIZER, CLASS_CONST_CATEGORIZER, CLASS_CONSTRUCT_CATEGORIZER, CLASS_DISC_CATEGORIZER, CLASS_DISC_NODE_CATEGORIZER, CLASS_DTREE_CATEGORIZER, CLASS_IB_CATEGORIZER, CLASS_LAZYDT_CATEGORIZER, CLASS_LEAF_CATEGORIZER, CLASS_LINDISCR_CATEGORIZER, CLASS_MAJORITY_CATEGORIZER, CLASS_MULTI_SPLIT_CATEGORIZER, CLASS_MULTITHRESH_CATEGORIZER, CLASS_NB_CATEGORIZER, CLASS_ODT_CATEGORIZER, CLASS_ONE_R_CATEGORIZER, CLASS_OPTION_CATEGORIZER, CLASS_PROJECT_CATEGORIZER, CLASS_RDG_CATEGORIZER, CLASS_STACKING_CATEGORIZER, CLASS_TABLE_CATEGORIZER, CLASS_THRESHOLD_CATEGORIZER, logOptions

Fields inherited from class shared.Globals

badCategorizer, CONFIDENCE_INTERVAL_Z, DBG, DEFAULT_DATA_EXT, DEFAULT_EPSILON, DEFAULT_EVAL_LIMIT, DEFAULT_LAMBDA, DEFAULT_MAX_EVALS, DEFAULT_MAX_STALE, DEFAULT_MIN_EXP_EVALS, DEFAULT_NAMES_EXT, DEFAULT_SAS_SEED, DEFAULT_SEARCH_METHOD, DEFAULT_SHOW_TEST_SET_PERF, DEFAULT_TEST_EXT, DISPLAY_NAMES, EMPTY_STRING, FIRST_CATEGORY_VAL, FIRST_NOMINAL_VAL, LEFT_NODE, MAX_NUM_CATEGORIES, Mcerr, Mcout, optionServer, optionsFileName, REAL_MAX, RIGHT_NODE, SHOW_TEST_SET_PERF_HELP, SINGLE_QUOTE, STORED_REAL_MAX, TS, UNDEFINED_INT, UNDEFINED_REAL, UNDEFINED_VARIANCE, UNKNOWN_AUG_CATEGORY, UNKNOWN_CATEGORY_VAL, UNKNOWN_NODE, UNKNOWN_NOMINAL_VAL, UNKNOWN_STORED_REAL_VAL, UNKNOWN_VAL_STR

Constructor Summary

TableCategorizer(InstanceList instList, int defaultCategory, java.lang.String dscr)
Initializes the table with the given InstanceList and relays the description and number of categories to the Categorizer constructor.

Method Summary

AugCategory	categorize(Instance instance) Returns category if instance found in table, otherwise returns defaultCat.
void	display_struct(java.io.BufferedWriter stream, DisplayPref dp) Prints a readable representation of the categorizer to the given stream.
void	set_tiebreaking_order(int[] newOrder) Resets the tiebreaking order.

Methods inherited from class shared.Categorizer

build_distr, clone, description, get_distr, get_log_level, get_log_options, get_log_stream, get_schema, has_distr, num_categories, score, set_description, set_distr, set_log_level, set_log_options, set_log_prefixes, set_log_stream, set_original_distr, set_used_attr, supports_scoring, total_weight

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

hashTable

protected InstanceHashTable hashTable

Hashtable of Instances used in this categorizer.

Constructor Detail

TableCategorizer

public TableCategorizer(InstanceList instList,
                        int defaultCategory,
                        java.lang.String dscr)

Initializes the table with the given InstanceList and relays the description and number of categories to the Categorizer constructor.

Parameters:

instList - InstanceList obect containing the Instances used to populate the hash table of instances.

defaultCategory - Integer indicating the default category for this Categorizer.

dscr - String description of this Categprizer object.

Method Detail

categorize

public AugCategory categorize(Instance instance)

Returns category if instance found in table, otherwise returns defaultCat. This will return the category of the majority instances found.

Overrides:

categorize in class Categorizer

Parameters:

instance - Instance object to be categorized.

Returns:

Category of the supplied Instance object.

display_struct

public void display_struct(java.io.BufferedWriter stream,
                           DisplayPref dp)

Prints a readable representation of the categorizer to the given stream.

Overrides:

display_struct in class Categorizer

Parameters:

stream - The BufferedStream to which the representation of this Categorizer will be printed.

dp - The preferences for display.

set_tiebreaking_order

public void set_tiebreaking_order(int[] newOrder)

Resets the tiebreaking order. The tiebreaking order must follow the rules for tiebreaking orders, as set in CatDist.java

Parameters:

newOrder - The new order for tiebreaking.