dDeta Obtaining derivative w.r.t. linear predictor
Description
INTERNAL function. Distribution families provide derivatives of the deviance and link w.r.t. mu = inv_link(eta). This routine converts these to the required derivatives of the deviance w.r.t. eta, the linear predictor.
Usage
dDeta(y, mu, wt, theta, fam, deriv = 0)
Arguments
y |
vector of observations. |
mu |
if |
wt |
vector of weights. |
theta |
vector of family parameters that are not regression coefficients (e.g. scale parameters). |
fam |
the family object. |
deriv |
the order of derivative of the smoothing parameter score required. |
Value
A list of derivatives.
Author(s)
Simon N. Wood <simon.wood@r-project.org>.
Copyright (©) 1999–2012 R Foundation for Statistical Computing.
Licensed under the GNU General Public License.