split.lua

#

The file is part of the BURN project (learing multi-objective rules).
Because learning is not the filling a pail, but the lighting of a fire.

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local Object=require("object")

local Split=Object:new{txt,rule, op, val}

function Split:show() return self.txt..self.op..self.val end

#

Factory: Split.eq

Returns a spliter on x==val

function Split.eq(x, txt, val, score)
  return Split:new{txt=txt, 
     score= score, 
     val  = val, 
     op   = "=", 
     rule = function(r) return x(r)==val end} 
end

#

Factory: Split.gt

Returns a spliter on x>val

function Split.gt(x, txt,val,score)
  return Split:new{txt=txt, 
     score= score, 
     val  = val, 
     op   = ">", 
     rule = function(r) return x(r) > val end} 
end

#

Factory: Split.le

Returns a spliter on x <= val

function Split.le(x,txt, val,score)
  return Split:new{txt=txt, 
     score= score, 
     val  = val, 
     op   = "<=", 
     rule = function(r) return x(r) <= val end} 
end

return Split