org.omegahat.Environment.DataStructures
Class BasicDataFrame

java.lang.Object
  |
  +--org.omegahat.Environment.Databases.ObjectDatabase
        |
        +--org.omegahat.Environment.DataStructures.BasicDataFrame

All Implemented Interfaces:

Activable, BasicFrame, Database, DatabaseNotifier, DataFrame, DynamicFieldAccessInt, MergableInt, Named, java.io.Serializable, Subsettable

public class BasicDataFrame

extends ObjectDatabase

implements DataFrame

See Also:

Serialized Form

Field Summary

protected character

RowNames

Fields inherited from class org.omegahat.Environment.Databases.ObjectDatabase

listeners, name, permissions, state, table, user

Fields inherited from interface org.omegahat.Environment.Databases.Database

ALL, ASSIGN, ATTACH, DETACH, NULL_ENTRY, READ, READ_WRITE, REMOVE

Fields inherited from interface org.omegahat.Environment.Databases.Activable

ACTIVE, INACTIVE

Constructor Summary

BasicDataFrame()

Method Summary

Variable	getVariable(java.lang.String name)
java.lang.String[]	getVariableNames() Return a (ordered) list of the names of the variables contained in this collection.
long	numObservations() Return the number of observations available in each of the variables.
long	numVariables() Return the number of variables contained in this frame.
java.lang.String[]	rowNames() Returns an array of the identifiers of the row names.
character	RowNames()
character	RowNames(character r)
BasicFrame	subsetObservations(int[] whichRows) Create a new data frame consisting of the rows identified in the array passed to this method.
BasicFrame	subsetObservations(int start, int which) Get the subset of the data frame of the continguous rows starting at start and ending at which, inclusive.

Methods inherited from class org.omegahat.Environment.Databases.ObjectDatabase

addAssignListener, addAttachListener, addDetachListener, addListener, addRemoveListener, assign, assign, attach, clear, detach, exists, get, getDynamicField, getName, getState, getTable, merge, merge, notify, objects, put, readOnly, readOnly, readSerialized, readSerialized, readSerialized, remove, remove, setDynamicField, setName, setState, setTable, size, subset, table, table

Methods inherited from class java.lang.Object

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

Field Detail

RowNames

protected character RowNames

Constructor Detail

BasicDataFrame

public BasicDataFrame()

Method Detail

getVariableNames

public java.lang.String[] getVariableNames()

Description copied from interface: BasicFrame

Return a (ordered) list of the names of the variables contained in this collection.

Specified by:

getVariableNames in interface BasicFrame

numVariables

public long numVariables()

Description copied from interface: BasicFrame

Return the number of variables contained in this frame.

Specified by:

numVariables in interface BasicFrame

numObservations

public long numObservations()

Description copied from interface: BasicFrame

Return the number of observations available in each of the variables. This assumes that the variables have the same number of records/observations.

Specified by:

numObservations in interface BasicFrame

rowNames

public java.lang.String[] rowNames()

Description copied from interface: BasicFrame

Returns an array of the identifiers of the row names.

Specified by:

rowNames in interface BasicFrame

getVariable

public Variable getVariable(java.lang.String name)

Specified by:

getVariable in interface BasicFrame

subsetObservations

public BasicFrame subsetObservations(int[] whichRows)

Description copied from interface: DataFrame

Create a new data frame consisting of the rows identified in the array passed to this method.

Specified by:

subsetObservations in interface DataFrame

subsetObservations

public BasicFrame subsetObservations(int start,
                                     int which)

Description copied from interface: DataFrame

Get the subset of the data frame of the continguous rows starting at start and ending at which, inclusive.

Specified by:

subsetObservations in interface DataFrame

RowNames

public character RowNames()

RowNames

public character RowNames(character r)