Package org.moeaframework.util.tree

package org.moeaframework.util.tree
Classes for representing, building and evaluating expression trees for use in Genetic Programming (GP).

References:

  1. Poli, R., Langdon, W.B., McPhee, N.F., Koza, J.R. "A Field Guide to Genetic Programming." Available online at <http://www.gp-field-guide.org.uk>, 26 March 2008.
  2. Koza, J.R. "Genetic Programming: On the Programming of Computers by Means of Natural Selection." MIT Press, Cambridge, MA, USA, 1992.
  • Class
    Description
    Abs
    The node for calculating the absolute value of a number.
    Acos
    The node for calculating the arc cosine of a number.
    Acosh
    The node for calculating the hyperbolic arc cosine of a number.
    Add
    The node for adding two numbers.
    And
    The node for calculating the logical AND of two boolean values.
    Asin
    The node for calculating the arc sine of a number.
    Asinh
    The node for calculating the hyperbolic arc sine of a number.
    Atan
    The node for calculating the arc tangent of a number.
    Atanh
    The node for calculating the hyperbolic arc tangent of a number.
    Call
    The node for calling a named function.
    Ceil
    The node for calculating the smallest integer value that is greater than or equal to a number.
    Constant
    The node for defining a constant value.
    Cos
    The node for calculating the trigonometric cosine of an angle specified in radians.
    Cosh
    The node for calculating the hyperbolic cosine of a number.
    Define
    The node for defining a callable, named function.
    Divide
    The node for dividing two numbers.
    Environment
    The execution context, or environment, storing the named variables used by a program.
    Equals
    The node for comparing two numbers for equality.
    Exp
    The node for calculating the result of Euler's number e raised to the power of a number.
    Floor
    The node for calculating the largest integer value that is less than or equal to a number.
    For
    The node for executing an expression for a given number of iterations.
    Get
    The node for reading the value stored in a named variable within the current scope.
    GreaterThan
    The node for comparing if one number is greater than another.
    GreaterThanOrEqual
    The node for comparing if a number is greater than or equal to another.
    IfElse
    The node for executing one of two expressions depending on the result of a boolean expression.
    Lambda
    The node for defining an immutable, anonymous function.
    LessThan
    The node for comparing if a number is less than another.
    LessThanOrEqual
    The node for comparing if a number is less than or equal to another.
    Log
    The node for calculating the natural logarithm of a number.
    Log10
    The node for calculating the base-10 logarithm of a number.
    Max
    The node for calculating the maximum value of the two arguments.
    Min
    The node for calculating the minimum value of the two arguments.
    Modulus
    The node for calculating the modulus, or remainder, of two numbers.
    Multiply
    The node for multiplying two numbers.
    Node
    A node in an expression tree.
    NOP
    The node for defining an empty expression.
    Not
    The node for calculating the logical NOT of a boolean value.
    NoValidNodeException
    Exception indicating no valid tree node was found, so no valid tree could be generated.
    NumberArithmetic
    Provides many arithmetic and trigonometric functions that operate on Numbers, performing any necessary implicit casting.
    Or
    The node for calculating the logical OR of two boolean values.
    Power
    The node for calculating the power of a base number and exponent.
    Round
    The node for rounding a number to the nearest integer.
    Rules
    The rules defining the program syntax.
    Sequence
    The node for executing two or more expressions in sequence.
    Set
    The node for assigning the value of a named variable within the current scope.
    Sign
    The node for calculating the sign of a number.
    Sin
    The node for calculating the trigonometric sine of an angle specified in radians.
    Sinh
    The node for calculating the hyperbolic sine of a number.
    Square
    The node for calculating the square of a number.
    SquareRoot
    The node for calculating the square root of a number.
    Subtract
    The node for subtracting two numbers.
    Tan
    The node for calculating the trigonometric tangent of an angle specified in radians.
    Tanh
    The node for calculating the hyperbolic tangent of a number.
    Truncate
    The node for truncating, or bounding, a number within a range.
    UnsatisfiedArgumentException
    Exception indicating a tree node had one or more unsatisfied arguments so no valid tree could be constructed.
    While
    The node for repeatedly executing an expression while a condition, a boolean expression, remains true.