| java.lang.Object
 edu.hws.jcm.data.SimpleFunction
| SimpleFunction | | public class SimpleFunction implements Function(Code) | | An object belonging to this class is a function of one or more variables.
It is defined by an expression, e, and a list of variables, which presumably
can occur in e. The value of the function at arguments x1,x2,... is obtained by
assigning the x's as the values of the variables and then evaluating
the expression e.
Note: When the function is evaluated, the values of the variables that act
as its parameters are saved and the variables are set to the values of the actual parameters
provided for the function. After the evaluation, the saved values are restored.
Usually, this is OK, but if setting the value of the variable has a side effect
(such as changing the position of a VariableSlider), it could be a problem.
So, don't use the variables associated with VariableSliders or VariableInputs
in SimpleFunctions.
Note: A SimpleFunction is not a MathObject and does not have a name.
It cannot be added to a Parser. If you want to do somethign like that,
use an ExpressionFunction (defined in package edu.hws.jcm.functions).
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| Method Summary | |
| public boolean | dependsOn(Variable x)
Return true if the definition of this function depends
in some way on the variable x. | | public Function | derivative(int wrt)
Return the derivative of the function with repect to
argument number wrt, where arguments are numbered starting from 1. | | public Function | derivative(Variable x)
Return the derivative of the function with respect to the
variable x. | | public int | getArity()
Return the number of arguments of this function. | | public double | getVal(double[] arguments)
Find the value of the function at the argument values
argument[0], argument[1].... | | public double | getValueWithCases(double[] arguments, Cases cases)
Find the value of the function at the argument values
argument[0], argument[1].... |
| SimpleFunction | | public SimpleFunction(Expression e, Variable v)(Code) | | Create the function of one variable such that the value
of the function at x is obtained by temporarily assigning x as the
value of the variable v and then evaluating e. e and v
should be non-null (or errors will result when the function
is used. Note that evaluating the function will temporarily
change the value of the variable.
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| SimpleFunction | | public SimpleFunction(Expression e, Variable[] v)(Code) | | Create a function. The arity of the function is
the length of the array v. The value of the function
at a given list of arguments is obtained by temporarily
assigning the arguement values to the variables, and then
returning the value of the expression. e and v should
be non-null. Note that evaluating the function will
temporarily change the values of the variables.
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| dependsOn | | public boolean dependsOn(Variable x)(Code) | | Return true if the definition of this function depends
in some way on the variable x. (Note that the function does
NOT depend on the variables that are being used as its parameters!)
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| derivative | | public Function derivative(int wrt)(Code) | | Return the derivative of the function with repect to
argument number wrt, where arguments are numbered starting from 1.
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| derivative | | public Function derivative(Variable x)(Code) | | Return the derivative of the function with respect to the
variable x. (Note that the derivative w.r.t one of the variables
that are being used as the parameter of this function is ZERO!)
To get the derivative with respect to the i-th parameter variable,
call derivative(i).
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| getArity | | public int getArity()(Code) | | Return the number of arguments of this function.
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| getVal | | public double getVal(double[] arguments)(Code) | | Find the value of the function at the argument values
argument[0], argument[1].... (If not enough arguments are supplied,
an ArrayIndexOutOfBoundsException will be thrown. Extra
arguments are ignored.)
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| getValueWithCases | | public double getValueWithCases(double[] arguments, Cases cases)(Code) | | Find the value of the function at the argument values
argument[0], argument[1].... Information about "cases" is stored in
the Cases parameter, if it is non-null. See the Cases
class for more information.
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