getD: getD
In kloke/rbgee: Rank-based GEE fits

Description Usage Arguments Author(s) References Examples

Computes the Hessian matrix D; see Section 8.6 of Kloke and McKean (2014). Currently the only option is the identity link; i.e., D is the design matrix.

1	getD(xmat, center, beta, geemod = "LM")

`xmat`
`center`
`beta`
`geemod`

Joseph W. McKean

Kloke and McKean (2014), Nonparametrics Using R, Boca Raton: Chapman-Hall.

##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

## The function is currently defined as
function (xmat, center, beta, geemod = "LM") 
{
    if (geemod == "LM") {
        D <- xmat
    }
    return(D)
  }