Class Identity
- java.lang.Object
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- org.apache.commons.math3.analysis.function.Identity
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- All Implemented Interfaces:
DifferentiableUnivariateFunction
,UnivariateDifferentiableFunction
,UnivariateFunction
public class Identity extends Object implements UnivariateDifferentiableFunction, DifferentiableUnivariateFunction
Identity function.- Since:
- 3.0
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Constructor Summary
Constructors Constructor Description Identity()
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description DifferentiableUnivariateFunction
derivative()
Deprecated.as of 3.1, replaced byvalue(DerivativeStructure)
double
value(double x)
Compute the value of the function.DerivativeStructure
value(DerivativeStructure t)
Simple mathematical function.
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Method Detail
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value
public double value(double x)
Compute the value of the function.- Specified by:
value
in interfaceUnivariateFunction
- Parameters:
x
- Point at which the function value should be computed.- Returns:
- the value of the function.
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derivative
@Deprecated public DifferentiableUnivariateFunction derivative()
Deprecated.as of 3.1, replaced byvalue(DerivativeStructure)
Returns the derivative of the function- Specified by:
derivative
in interfaceDifferentiableUnivariateFunction
- Returns:
- the derivative function
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value
public DerivativeStructure value(DerivativeStructure t)
Simple mathematical function.UnivariateDifferentiableFunction
classes compute both the value and the first derivative of the function.- Specified by:
value
in interfaceUnivariateDifferentiableFunction
- Parameters:
t
- function input value- Returns:
- function result
- Since:
- 3.1
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