[R] Custom Numeric type in R

Charles Berry ccberry at ucsd.edu
Sun Nov 10 18:49:14 CET 2013

Christofer Bogaso <bogaso.christofer <at> gmail.com> writes:

> Hi again,
> In R, there are various numerics like, NA, Inf, or simple integers etc.
> However I want to include one custom type: "TBD", which R should treat as
> numeric, not character.
> That "TBD" should have same property like Inf, however except this: TBD -
> TBD = 0
> In future, I am planning to add few more properties to TBD.
> Can somebody guide me if this is possible in R, ans also some pointer on
> how can be done in R

Possible? Yes.

Your question might be framed as 

"How do I create a class and write a method for '-' that does ... ?"

The answer is "learn about methods and classes in R".

To get started, see


and follow the links therein.

Check the posting guide. If you need to follow up, you should consider
whether the question you have fits better on R-devel.

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