d_alpha_proxy {regDIF} | R Documentation |
Partial derivatives for mean impact equation using proxy data.
Description
Partial derivatives for mean impact equation using proxy data.
Usage
d_alpha_proxy(
p_impact,
prox_data,
mean_predictors,
var_predictors,
cov,
samp_size,
num_items
)
Arguments
p_impact |
Vector of impact parameters. |
prox_data |
Matrix of observed proxy scores. |
mean_predictors |
Possibly different matrix of predictors for the mean impact equation. |
var_predictors |
Possibly different matrix of predictors for the variance impact equation. |
cov |
Covariate being maximized. |
samp_size |
Sample size in data set. |
num_items |
Number of items in data set. |
Value
a "list"
of first and second partial derivatives for mean impact equation (to
use with coordinate descent and univariate Newton-Raphson)
[Package regDIF version 1.1.1 Index]