Re: [Rd] Dispatch mechanism seems to alter object before calling method on it

On Wed, May 16, 2018 at 3:45 PM, Hervé Pagès wrote: > On 05/16/2018 01:24 PM, Michael Lawrence wrote: >> >> On Wed, May 16, 2018 at 12:23 PM, Hervé Pagès >> wrote: >>> >>> On 05/16/2018 10:22 AM, Michael Lawrence wrote: Factors and

Re: [Rd] Dispatch mechanism seems to alter object before calling method on it

On 05/16/2018 01:24 PM, Michael Lawrence wrote: On Wed, May 16, 2018 at 12:23 PM, Hervé Pagès wrote: On 05/16/2018 10:22 AM, Michael Lawrence wrote: Factors and data.frames are not structures, because they must have a class attribute. Just call them "objects". They are

Re: [Rd] Dispatch mechanism seems to alter object before calling method on it

On Wed, May 16, 2018 at 12:23 PM, Hervé Pagès wrote: > On 05/16/2018 10:22 AM, Michael Lawrence wrote: >> >> Factors and data.frames are not structures, because they must have a >> class attribute. Just call them "objects". They are higher level than >> structures, which in

Re: [Rd] Dispatch mechanism seems to alter object before calling method on it

On 05/16/2018 10:22 AM, Michael Lawrence wrote: Factors and data.frames are not structures, because they must have a class attribute. Just call them "objects". They are higher level than structures, which in practice just shape data without adding a lot of semantics. Compare getClass("matrix")

Re: [Rd] Dispatch mechanism seems to alter object before calling method on it

Factors and data.frames are not structures, because they must have a class attribute. Just call them "objects". They are higher level than structures, which in practice just shape data without adding a lot of semantics. Compare getClass("matrix") and getClass("factor"). I agree that inheritance

Re: [Rd] Dispatch mechanism seems to alter object before calling method on it

On 05/15/2018 09:13 PM, Michael Lawrence wrote: My understanding is that array (or any other structure) does not "simply" inherit from vector, because structures are not vectors in the strictest sense. Basically, once a vector gains attributes, it is a structure, not a vector. The methods

Re: [Rd] Dispatch mechanism seems to alter object before calling method on it

My understanding is that array (or any other structure) does not "simply" inherit from vector, because structures are not vectors in the strictest sense. Basically, once a vector gains attributes, it is a structure, not a vector. The methods package accommodates this by defining an "is"