CFtime

This function creates an instance of the <code>CFtime</code> class. The arguments to
the call are typically read from a CF-compliant data file with climatological
observations or climate projections. Specification of arguments can also be
made manually in a variety of combinations.

Support for all calendars as specified in the Climate and Forecast
(CF) Metadata Conventions for climate and forecasting data. The CF Metadata
Conventions is widely used for distributing files with climate observations
or projections, including the Coupled Model Intercomparison Project (CMIP)
data used by climate change scientists and the Intergovernmental Panel on
Climate Change (IPCC). This package specifically allows the user to work
with any of the CF-compliant calendars (many of which are not compliant with
POSIXt). The CF time coordinate is formally defined in the CF Metadata
Conventions document available at <https://cfconventions.org/Data/cf-conventions/cf-conventions-1.10/cf-conventions.html#time-coordinate>.

Patrick Van Laake

Using CF-Compliant Calendars with Climate Projection Data

CFtime function

<dl><dt>definition</dt>
<dd>character. An atomic string describing the time coordinate
of a CF-compliant data file.</dd>
<dt>calendar</dt>
<dd>character. An atomic string describing the calendar to use
with the time dimension definition string. Default value is "standard".</dd>
<dt>offsets</dt>
<dd>numeric or character, optional. When numeric, a vector of
offsets from the origin in the time series. When a character vector,
timestamps in ISO8601 or UDUNITS format. When an atomic character string, a
timestamp in ISO8601 or UDUNITS format and then a time series will be
generated with a separation between steps equal to the unit of measure in
the definition, inclusive of the definition timestamp. The unit of measure
of the offsets is defined by the time series definition.</dd></dl>

Arguments

Create a CFtime object — CFtime

<dl>

<dt>definition</dt>
<dd>character. An atomic string describing the time coordinate
of a CF-compliant data file.</dd>


<dt>calendar</dt>
<dd>character. An atomic string describing the calendar to use
with the time dimension definition string. Default value is "standard".</dd>


<dt>offsets</dt>
<dd>numeric or character, optional. When numeric, a vector of
offsets from the origin in the time series. When a character vector,
timestamps in ISO8601 or UDUNITS format. When an atomic character string, a
timestamp in ISO8601 or UDUNITS format and then a time series will be
generated with a separation between steps equal to the unit of measure in
the definition, inclusive of the definition timestamp. The unit of measure
of the offsets is defined by the time series definition.</dd>

</dl>

CFtime: Create a CFtime object

Description

Usage

Value

Arguments

Examples