is.Date

Tests if an object is a <code>Date</code> object and returns
a logical vector of length 1. <code>IDate</code> objects are also 
<code>Date</code> objects, but <code>date</code> objects from package date
are not.

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

is.Date function

<dl><dt>obj</dt>
<dd>object to test on</dd></dl>

Arguments

Author

Test if object is a Date object — is.Date

<dl>

<dt>obj</dt>
<dd>object to test on</dd>

</dl>

is.Date: Test if object is a `Date` object

Description

Usage

Value

Arguments

Author

See Also