Can an Object be Coerced to a Certain S4 Class?

canCoerce {methods}

R Documentation

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.

canCoerce(object, Class)

`object`	any R object, typically of a formal S4 class.
`Class`	an S4 class (see `isClass`).

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

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

[Package methods version 3.5.0 Index]