us.gpd=gpd.tail(us,one.tail=F,upper=us.right.thresh,lower=us.left.thresh)
Warning messages:
  Maximum Likelihood Method for the GPD did not converge in: gpd.ml(sample = excess, location =
        0)
Problem in .Fortran(if(!cmplx) "dqr" else "zqr",: subroutine dqr: Missing values in argument 1
Use traceback() to see the call stack

有人知道这是什么意思吗吗吗