deriv_inverse.link: Derivatives of inverse of link function (internal use)
Description
Computes derivatives of inverse of link functions (real estimates) with
respect to the beta parameters which are used for delta method computation
of the var-cov matrix of real parameters.
Usage
deriv_inverse.link(real, x, link)
Arguments
real
Vector of values of real parameters
x
Matrix of design values
link
Type of link function (e.g., "logit")
Value
Vector of derivative values computed at values of real parameters
Details
Note: that function was renamed to deriv_inverse.link to avoid S3 generic
class conflicts. The derivatives of the inverse of the link functions are
simple computations using the real values and the design matrix values. The
body of the function is as follows:
switch(link, logit=x*real*(1-real), log=x*real,
loglog=-real*x*log(real), cloglog=-log(1-real)*x*(1-real), identity=x,
mlogit=x*real*(1-real))