randomFunctionCreation: Creates an R function with a random expression as its body
In rgp: R genetic programming framework

Creates an R function with a random expression as its body

randfunc(funcset, inset, conset, maxdepth = 8, constprob = 0.2,
  exprfactory = randexprGrow, breedingFitness = function(individual) TRUE,
  breedingTries = 50)

randfuncRampedHalfAndHalf(funcset, inset, conset, maxdepth = 8,
  constprob = 0.2, breedingFitness = function(individual) TRUE,
  breedingTries = 50)

`funcset`	The function set.
`inset`	The set of input variables.
`conset`	The set of constant factories.
`maxdepth`	The maximum expression tree depth.
`exprfactory`	The function to use for randomly creating the function's body.
`constprob`	The probability of generating a constant in a step of growth, if no subtree is generated. If neither a subtree nor a constant is generated, a randomly chosen input variable will be generated. Defaults to `0.2`.
`breedingFitness`	A breeding function. See the documentation for `geneticProgramming` for details.
`breedingTries`	The number of breeding steps.