date2num

num2date

<code>date2num</code> and <code>num2date</code> support conversion between
<code>tind</code> dates and integer representations of dates (days since ...)
found in different software packages.

Provides an easy-to-use tind class representing time indices
of different types (years, quarters, months, ISO 8601 weeks, dates,
time of day, date-time, and arbitrary integer/numeric indices).
Includes an extensive collection of functions for calendrical computations
(including business applications), index conversions, index parsing,
and other operations. Auxiliary classes representing time differences and
time intervals (with set operations and index matching functionality) are
also provided. All routines have been optimised for speed in order
to facilitate computations on large datasets. More details regarding
calendars in general and calendrical algorithms can be found in
"Calendar FAQ" by Claus Tøndering <https://www.tondering.dk/claus/calendar.html>.

Grzegorz Klima

tind

A Common Representation of Time Indices of Different Types

date2num function

<dl><dt>x</dt>
<dd>a <code>tind</code> with dates or an integer vector.</dd>
<dt>format</dt>
<dd>a character value determing numeric representation of date;
currently, the following are supproted: <code>"R"</code>,
<code>"MATLAB"</code>, <code>"Excel"</code>, <code>"SAS"</code>,
<code>"JDN"</code> (Julian Day Number).</dd></dl>

Arguments

Conversion between Dates and Their Integer Representations — date2num

<dl>

<dt>x</dt>
<dd>a <code>tind</code> with dates or an integer vector.</dd>


<dt>format</dt>
<dd>a character value determing numeric representation of date;
currently, the following are supproted: <code>"R"</code>,
<code>"MATLAB"</code>, <code>"Excel"</code>, <code>"SAS"</code>,
<code>"JDN"</code> (Julian Day Number).</dd>

</dl>

date2num: Conversion between Dates and Their Integer Representations

Description

Usage

Value

Arguments

See Also

Examples