IRFrf: Compute Local Projection IRF by Random Forest Method
In common2016/VARrf: What the Package Does (One Line, Title Case)

Compute Local Projection IRF by Random Forest Method

IRFrf(
  data,
  indx = NULL,
  pmax = 5,
  p = NULL,
  s = 12,
  shockvar = 1,
  d = 1,
  histime = 1
)

`indx`	if `data` is time series, `indx` is NULL. If `data` is panal data, `indx` is a character string vector whose length is 2, the 1st element is coloumn name of individual id, and the 2nd element is coloumn names of time.
`pmax`	max lag order where select a lag order which has minimum OOB MSE.
`p`	set up the lag order directly, and don't select from `pmax`.
`s`	the horizon of IRF
`shockvar`	a numeric scalor which denotes the shock variable.
`d`	the size of shock Impulse Response Function by Random Forest
`histime`	the numerical scalor that represents the time of shock, i.e. row index of `data`.