Can an Object be Coerced to a Certain S4 Class?

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Description

Test if an object can be coerced to a given S4 class. Maybe useful inside if() to ensure that calling as(object, Class) will find a method.

Usage

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canCoerce(object, Class)

Arguments

object

any R object, typically of a formal S4 class.

Class

an S4 class (see isClass).

Value

a scalar logical, TRUE if there is a coerce method (as defined by e.g. setAs) for the signature (from = class(object), to = Class).

See Also

as, setAs, selectMethod, setClass,

Examples

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m <- matrix(pi, 2,3)
canCoerce(m, "numeric") # TRUE
canCoerce(m, "array")   # TRUE

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