Class "characterOrNULL"

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Description

the _union_ of classes character and NULL

the _union_ of classes data.frame and NULL

internal character object to store information about the literature used in the reference-attribute of the objects returned by ?maSAE::predict.

Format

chr

Details

used by savObj, saeObj

used by saeObj

Objects from the Class

A virtual Class: No objects may be created from it.

See Also

?methods::setClassUnion

?methods::setClassUnion

Examples

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showClass("characterOrNULL")


showClass("data.frameOrNULL")