com.numericalmethod.suanshu.datastructure

Class DimensionCheck

java.lang.Object

com.numericalmethod.suanshu.datastructure.DimensionCheck

public class DimensionCheck
extends java.lang.Object

These are the utility functions for checking table dimension.

Method Summary

Modifier and Type	Method and Description
static boolean	isArray(Table A) Check if a table is a row or a column.
static boolean	isColumn(Table A) Check if a table is a column.
static boolean	isFat(Table A) Check if a table is fat.
static boolean	isRow(Table A) Check if a table is a row.
static boolean	isSameDimension(Table A1, Table A2) Check if two tables have the same dimension.
static boolean	isSquare(Table A) Check if a table is square.
static boolean	isTall(Table A) Check if a table is tall.
static void	throwIfDifferentDimension(Table A1, Table A2) Throws if A1.nRows() != A2.nRows() Or A1.nCols() != A2.nCols()
static void	throwIfIncompatible4Multiplication(Table A1, Table A2) Throws if A1.nCols() != A2.nRows()
static void	throwIfIncompatible4Multiplication(Table A, Vector v) Throws if A.nCols() != v.size()
static void	throwIfInvalidColumn(Table A, int j) Throws if accessing an out of range column.
static void	throwIfInvalidRow(Table A, int i) Throws if accessing an out of range row.

Methods inherited from class java.lang.Object

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

Method Detail

isColumn

public static boolean isColumn(Table A)

Check if a table is a column.

Parameters:

A - a table

Returns:

true if the table has only one column

isRow

public static boolean isRow(Table A)

Check if a table is a row.

Parameters:

A - a table

Returns:

true if the table has only one row

isArray

public static boolean isArray(Table A)

Check if a table is a row or a column.

Parameters:

A - a table

Returns:

true if the table has only one row or one column

isSquare

public static boolean isSquare(Table A)

Check if a table is square.

Parameters:

A - a table

Returns:

true if the table has as many rows as it has columns

isTall

public static boolean isTall(Table A)

Check if a table is tall.

Parameters:

A - a table

Returns:

true if the table has no fewer rows than it has columns

isFat

public static boolean isFat(Table A)

Check if a table is fat.

Parameters:

A - a table

Returns:

true if the table has no fewer columns than it has rows

isSameDimension

public static boolean isSameDimension(Table A1,
                                      Table A2)

Check if two tables have the same dimension.

Parameters:

A1 - a table

A2 - a table

Returns:

true if the rows and columns, i.e. the dimensions of A1 and A2, are equal

throwIfDifferentDimension

public static void throwIfDifferentDimension(Table A1,
                                             Table A2)

Throws if

A1.nRows() != A2.nRows()

Or

A1.nCols() != A2.nCols()

Parameters:

A1 - a table

A2 - a table

throwIfInvalidRow

public static void throwIfInvalidRow(Table A,
                                     int i)

Throws if accessing an out of range row.

Parameters:

A - a table

i - a row index

throwIfInvalidColumn

public static void throwIfInvalidColumn(Table A,
                                        int j)

Throws if accessing an out of range column.

Parameters:

A - a table

j - a column index

throwIfIncompatible4Multiplication

public static void throwIfIncompatible4Multiplication(Table A1,
                                                      Table A2)

Throws if

A1.nCols() != A2.nRows()

Parameters:

A1 - a table

A2 - a table

throwIfIncompatible4Multiplication

public static void throwIfIncompatible4Multiplication(Table A,
                                                      Vector v)

Throws if

A.nCols() != v.size()

Parameters:

A - a table

v - a vector