fill_NA_idx: Indices to Impute NA Elements of a Vector by LOCF
Description
Indices to impute NA elements of a vector by the
last-observation-carried-forward method. This is an internal function,
not intended to be called by package users.
Usage
fill_NA_idx(y)
Value
A vector of indices with the same length as y. If x <-
y[fill_NA_idx(y)], then x will be y with NA values imputed
by the last-observation-carried-forward method.