Package com.singularsys.extensions.matrix

Class MatrixFieldCollection

java.lang.Object

com.singularsys.extensions.field.FieldCollection

com.singularsys.extensions.matrix.MatrixFieldCollection

All Implemented Interfaces:

FieldI, IntegerConvertor, MatrixFieldI, JepComponent, Serializable

public class MatrixFieldCollection
extends FieldCollection
implements MatrixFieldI

A collection of fields including one matrix. It is not currently possible to use two different types of matrices together. You can combine a matrix type with other field implementations such as the BooleanField to add logical capability.

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.singularsys.extensions.field.FieldCollection

fields

Constructor Summary

Constructors

Constructor	Description
MatrixFieldCollection(FieldI... fields)

Method Summary

Modifier and Type	Method	Description
Object	convertFromInt(Integer l)	Attempt to convert argument from an integer
Integer	convertToInt(Object l)	Attempt to convert argument to an integer
Object	cross(Object l, Object r)	The cross product of two vectors
Object	det(Object mat)	The determinant of a matrix
Object	dot(Object l, Object r)	The dot product of two vectors
JepComponent	getLightWeightInstance()	Returns this
void	init(Jep jep)	Initialize the component.
Object	inv(Object mat)	Returns the inverse of a square matrix.
Object	solve(Object l, Object r)	Solve equation A * X = B
Object	trace(Object mat)	Returns the trace of a matrix.
Object	trans(Object mat)	Transpose of a matrix

Methods inherited from class com.singularsys.extensions.field.FieldCollection

add, addField, and, clearFields, div, eq, ge, getFields, getOne, getZero, gt, le, lt, mod, mul, ne, neg, not, or, pow, removeField, sub

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.singularsys.extensions.field.FieldI

add, and, div, eq, ge, getOne, getZero, gt, le, lt, mod, mul, ne, neg, not, or, pow, sub

Constructor Details

MatrixFieldCollection

public MatrixFieldCollection(FieldI... fields)

Method Details

det

public Object det(Object mat)
           throws EvaluationException

Description copied from interface: MatrixFieldI

The determinant of a matrix

Specified by:

det in interface MatrixFieldI

Parameters:

mat -

Returns:

the determinant of mat if it is a matrix

Throws:

EvaluationException

trans

public Object trans(Object mat)
             throws EvaluationException

Description copied from interface: MatrixFieldI

Transpose of a matrix

Specified by:

trans in interface MatrixFieldI

Parameters:

mat - the matrix

Returns:

a matrix containing the transpose

Throws:

EvaluationException

dot

public Object dot(Object l,
 Object r)
           throws EvaluationException

Description copied from interface: MatrixFieldI

The dot product of two vectors

Specified by:

dot in interface MatrixFieldI

Parameters:

l -

r -

Returns:

the dot product if both arguments are vectors, null otherwise.

Throws:

EvaluationException

cross

public Object cross(Object l,
 Object r)
             throws EvaluationException

Description copied from interface: MatrixFieldI

The cross product of two vectors

Specified by:

cross in interface MatrixFieldI

Parameters:

l -

r -

Returns:

a vector with the cross product

Throws:

EvaluationException - if either vectors not of length 3

trace

public Object trace(Object mat)
             throws EvaluationException

Description copied from interface: MatrixFieldI

Returns the trace of a matrix.

Specified by:

trace in interface MatrixFieldI

Parameters:

mat - the matrix

Returns:

the trace

Throws:

EvaluationException

inv

public Object inv(Object mat)
           throws EvaluationException

Description copied from interface: MatrixFieldI

Returns the inverse of a square matrix.

Specified by:

inv in interface MatrixFieldI

Parameters:

mat - the matrix

Returns:

the trace

Throws:

EvaluationException - if matrix is not square or is singular

solve

public Object solve(Object l,
 Object r)
             throws EvaluationException

Description copied from interface: MatrixFieldI

Solve equation A * X = B

Specified by:

solve in interface MatrixFieldI

Parameters:

l - a square matrix

r - either a vector or matrix with same number of rows as A

Returns:

a vector or matrix solving equations

Throws:

EvaluationException - if matrix is not square or is singular

convertToInt

public Integer convertToInt(Object l)
                     throws EvaluationException

Description copied from interface: IntegerConvertor

Attempt to convert argument to an integer

Specified by:

convertToInt in interface IntegerConvertor

Overrides:

convertToInt in class FieldCollection

Parameters:

l - value to convert

Returns:

corresponding integer or null if it cannot be converted

Throws:

EvaluationException - on error

convertFromInt

public Object convertFromInt(Integer l)
                      throws EvaluationException

Description copied from interface: IntegerConvertor

Attempt to convert argument from an integer

Specified by:

convertFromInt in interface IntegerConvertor

Overrides:

convertFromInt in class FieldCollection

Parameters:

l - value to convert

Returns:

corresponding value in this field or null if it cannot be converted

Throws:

EvaluationException - probably never

init

public void init(Jep jep)

Description copied from interface: JepComponent

Initialize the component. This method is called whenever a component is added to Jep. Hence, it allows components to keep track of the other components they may rely on.

Specified by:

init in interface JepComponent

Parameters:

jep - the current Jep instance

getLightWeightInstance

public JepComponent getLightWeightInstance()

Returns this

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

either a new instance, null or 'this'.