CFAxisLongitude: Longitude CF axis object

In ncdfCF: Easy Access to NetCDF Files with CF Metadata Conventions

Longitude CF axis object

Description

This class represents a longitude axis. Its values are numeric. This class is used for axes that represent longitudes. This class adds some logic that is specific to longitudes, such as their range, orientation and their meaning. (In the near future, it will also support selecting data that crosses the 0-360 degree boundary.)

Super classes

ncdfCF::CFObject -> ncdfCF::CFAxis -> ncdfCF::CFAxisNumeric -> CFAxisLongitude

Active bindings

friendlyClassName

(read-only) A nice description of the class.

Methods

Public methods

• CFAxisLongitude$new()

• CFAxisLongitude$subset()

• CFAxisLongitude$clone()

Inherited methods

• ncdfCF::CFObject$append_attribute()
• ncdfCF::CFObject$attribute()
• ncdfCF::CFObject$delete_attribute()
• ncdfCF::CFObject$print_attributes()
• ncdfCF::CFObject$set_attribute()
• ncdfCF::CFObject$write_attributes()
• ncdfCF::CFAxis$peek()
• ncdfCF::CFAxis$shard()
• ncdfCF::CFAxis$time()
• ncdfCF::CFAxis$write()
• ncdfCF::CFAxisNumeric$brief()
• ncdfCF::CFAxisNumeric$indexOf()
• ncdfCF::CFAxisNumeric$print()
• ncdfCF::CFAxisNumeric$range()

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Method new()

Create a new instance of this class.

Usage

CFAxisLongitude$new(grp, nc_var, nc_dim, values)

Arguments

grp

The group that contains the netCDF variable.

nc_var

The netCDF variable that describes this instance.

nc_dim

The netCDF dimension that describes the dimensionality.

values

The coordinates of this axis.

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Method subset()

Return an axis spanning a smaller coordinate range. This method returns an axis which spans the range of indices given by the rng argument.

Usage

CFAxisLongitude$subset(group, rng = NULL)

Arguments

group

The group to create the new axis in.

rng

The range of values from this axis to include in the returned axis.

Returns

A CFAxisLongitude instance covering the indicated range of indices. If the rng argument includes only a single value, an CFAxisScalar instance is returned with the value from this axis. If the value of the argument is NULL, return the entire axis (possibly as a scalar axis).

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Method clone()

The objects of this class are cloneable with this method.

Usage

CFAxisLongitude$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

ncdfCF documentation built on April 16, 2025, 9:08 a.m.