[Haskell-beginners] Is there an "unscan" function?

Hello- Is there standard function in Haskell that effectively does an inverse scan? For example, scanl1 (\ x y -> x+y) [1,2,3,4] == [1,3,6,10]. So is there a very simple built-in way to do this hypothetical example?: unscanl1 (\ x y -> y-x) [1,3,6,10] == [1,2,3,4] Thanks, Jeffrey