Package edu.hws.jcm.data
Interface Function
- All Superinterfaces:
Serializable
- All Known Implementing Classes:
ExpressionFunction
,FunctionParserExtension
,SimpleFunction
,TableFunction
,WrapperFunction
A Function is a mathematical real-valued function of zero or more
real-valued arguments. The number of arguments is called the arity
of the function.
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Method Summary
Modifier and TypeMethodDescriptionboolean
Return true if the defintion of this function depends in some way on the variable x.derivative
(int wrt) Return the derivative of the function with repect to argument number wrt.Return the derivative of the function with respect to the variable x.int
getArity()
Return the number of arguments of this function.double
getVal
(double[] arguments) Find the value of the function at the argument values given by arguments[0], arguments[1], ...double
getValueWithCases
(double[] arguments, Cases cases) Find the value of the function at the argument values given by arguments[0], arguments[1], ...
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Method Details
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getArity
int getArity()Return the number of arguments of this function. This must be a non-negative integer. -
getVal
double getVal(double[] arguments) Find the value of the function at the argument values given by arguments[0], arguments[1], ... The length of the array, arguments, should be equal to the arity of the function. -
getValueWithCases
Find the value of the function at the argument values given by arguments[0], arguments[1], ... The length of the array argument should be equal to the arity of the function. Information about "cases" is stored in the Cases parameter, if it is non-null. See the Cases class for more information. -
derivative
Return the derivative of the function with repect to argument number wrt. For example, derivative(1) returns the derivative function with respedt to the first argument. Note that argements are numbered starting from 1. -
derivative
Return the derivative of the function with respect to the variable x. This will be non-zero only if x occurs somehow in the definition of x: For example, f(y) = sin(x*y); (This routine is required for the general function-differentiating code in the class FunctionParserExtension.) -
dependsOn
Return true if the defintion of this function depends in some way on the variable x. If not, it's assumed that the derivative w.r.t. x of the function, applied to any arguments that do not themselves depend on x, is zero. (This routine is required for the general function-differentiating code in the class FunctionParserExtension.)
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