modSearch {speff2trial} | R Documentation |
modSearch
is used internally by speff
to construct an optimal model for
prediction of the study endpoint or estimation of the missingness mechanism.
modSearch(formula, x, y, endpoint, method, optimal)
formula |
a formula object with the response on the left of the ~ operator, and the linear
predictor on the right. |
x |
a matrix of at least two predictors |
y |
a response vector |
endpoint |
a character string specifying the type of the response variable; possible values are
"quantitative " or "dichotomous ". |
method |
a character string specifying the type of search technique used in the model selection procedure;
possible values are "exhaustive ", "forward ", or " backward ". |
optimal |
specifies the optimization criterion for model selection; possible values are "cp " for
Mallow's Cp, "bic " for BIC, and "rsq " for R-squared. |