na2zero

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 epidemiological statistics, including
those where counts or mortality rates of the reference population are
used. Currently supported: excess hazard models (Dickman, Sloggett,
Hills, and Hakulinen (2012) <doi:10.1002/sim.1597>), rates, mean
survival times, relative/net survival (in particular the Ederer II
(Ederer and Heise (1959)) and Pohar Perme (Pohar Perme, Stare, and
Esteve (2012) <doi:10.1111/j.1541-0420.2011.01640.x>) estimators), and
standardized incidence and mortality ratios, all of which can be
easily adjusted for by covariates such as age. Fast splitting and
aggregation of 'Lexis' objects (from package 'Epi') and other
computations achieved using 'data.table'.

Joonas Miettinen

popEpi

Functions for Epidemiological Analysis using Population Data

Matti Rantanen

Karri Seppa

na2zero function

<dl><dt>DT</dt>
<dd><code>data.table</code> object</dd>
<dt>vars</dt>
<dd>a character string vector of variables names in <code>DT</code>;
if <code>NULL</code>, uses all variable names in <code>DT</code></dd></dl>

Arguments

Author

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

<dl>

<dt>DT</dt>
<dd><code>data.table</code> object</dd>


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

</dl>

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

Description

Usage

Value

Arguments

Author

Details