na2zero

a character string vector of variables names in <code>DT</code>;
if <code>NULL</code>, uses all variable names in <code>DT</code>

vars

Given a <code>data.table DT</code>, replaces any <code>NA</code> values
in the variables given in <code>vars</code> in <code>DT</code>. Takes a copy of the 
original data and returns the modified copy.

Enables computation of various epidemiological statistics where the use of population data such as population counts and hazards is required.
                 Relatively high computation speed achieved by using data.table.

na2zero: Convert NA's to zero in data.table

Description

Usage

Arguments

Details