logd {nspmix} | R Documentation |
Log-density and its derivative values
Description
A generic method to compute the log-density values and possibly their first derivatives with respec to theta and beta.
Usage
logd(x, beta, pt, which)
Arguments
x |
an object of a class for data. |
beta |
instrumental parameter in a semiparametric mixture. |
pt |
a vector of values for the mixing variable theta. |
which |
an integer vector of length 3, indicating if,
respectively, the log-density values, the derivatives wrt beta
and the derivatives wrt theta are to be computed and returned if
being 1 ( |
Value
ld |
a matrix, storing the log-density values for each (x[i], beta, pt[j], or NULL if not asked for. |
db |
a matrix, storing the log-density derivatives wrt beta for each (x[i], beta, pt[j], or NULL if not asked for. |
dt |
a matrix, storing the log-density derivatives wrt theta for each (x[i], beta, pt[j], or NULL if not asked for. |
Author(s)
Yong Wang <yongwang@auckland.ac.nz>