com.singularsys.extensions.matrix.functions

Class MatrixSize

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.UnaryFunction

com.singularsys.extensions.matrix.functions.MatrixSize

All Implemented Interfaces:

MatrixFunctionI, PostfixMathCommandI, java.io.Serializable

public class MatrixSize
extends UnaryFunction
implements MatrixFunctionI

Returns the size of an Scaler, Vector or Matrix.

 size(7) -> 1
 size([1,2,3]) -> 3
 size([[1,2,3],[4,5,6]]) -> [2,3]
 

Author:

Rich Morris Created on 13-Feb-2005

See Also:

Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor and Description
MatrixSize(MatrixFactoryI mfact, IntegerConvertor conv)

Method Summary

Modifier and Type	Method and Description
Dimensions	calcDims(Dimensions... inDims) Attempts to calculate the dimensions of a result of a PostfixMathCommand.
java.lang.Object	eval(java.lang.Object arg)

Methods inherited from class com.singularsys.jep.functions.UnaryFunction

run

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

MatrixSize

public MatrixSize(MatrixFactoryI mfact,
                  IntegerConvertor conv)

Method Detail

eval

public java.lang.Object eval(java.lang.Object arg)
                      throws EvaluationException

Specified by:

eval in class UnaryFunction

Throws:

EvaluationException

calcDims

public Dimensions calcDims(Dimensions... inDims)
                    throws ParseException

Description copied from interface: MatrixFunctionI

Attempts to calculate the dimensions of a result of a PostfixMathCommand.

Specified by:

calcDims in interface MatrixFunctionI

Parameters:

inDims - the dimensions of each argument

Returns:

the dimension of the result or null if can be calculated

Throws:

ParseException - if there is a parse error