R - Coerce methods (Object Class conversion)

About

Type Coercion in R.

The function as turns object into an object of class Class. In doing so, it applies a “coerce method”.

The implicitly defined coerce methods may be overridden by a call to setAs.

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Signature

Coerce methods have two arguments in method signatures:

• from: the class of the object
• to: the desired coerce class.

These functions must not be called directly, but are used to store tables of methods for the use of as, directly and for replacements.

Method

showMethods("coerce")

Function: coerce (package methods)
from="ANY", to="array"
from="ANY", to="call"
from="ANY", to="character"
from="ANY", to="complex"
from="ANY", to="environment"
from="ANY", to="expression"
from="ANY", to="function"
from="ANY", to="integer"
from="ANY", to="list"
from="ANY", to="logical"
from="ANY", to="matrix"
from="ANY", to="name"
from="ANY", to="NULL"
from="ANY", to="numeric"
from="ANY", to="S3"
from="ANY", to="S4"
from="ANY", to="ts"
from="ANY", to="vector"
from="character", to="signature"
from="character", to="SuperClassMethod"
from="color", to="HLS"
from="color", to="HSV"
from="color", to="LAB"
from="color", to="LUV"
from="color", to="polarLAB"
from="color", to="polarLUV"
from="color", to="RGB"
from="color", to="sRGB"
from="color", to="XYZ"
from="derivedDefaultMethod", to="function"
from="function", to="classGeneratorFunction"
from="function", to="OptionalFunction"
from="groupGenericFunction", to="genericFunction"
from="NULL", to="OptionalFunction"
from="NULL", to="optionalMethod"
from="oldClass", to="S3"

Documentation / Reference

?coerce
?as