[R] Make sure a data frame has been "fun through" a function

[stephen sefick]

Yes, I mean "won't annoy the user", will allow them to do anything they
need to do with a dataframe (write to csv, etc.), but will allow me to test
for in a down stream function of the analysis to stop the function and
present an error. Adding something to the class attribute seems like the
right thing to do. With my clarification do you think these seems like a
sensible thing to do? Thank you for all of the help.
kindest regards,

Stephen

On Mon, Feb 20, 2017 at 5:25 PM, Ista Zahn <istazahn at gmail.com> wrote:

> It depends on what you mean by 1). If you mean "won't annoy the user" then
> yes, e.g., add something to the class attribute. If 1) means "can't be
> discovered by the user" then no (at least not easily). Anything you can see
> they can see.
>
> Best,
> Ista
>
>
> On Feb 20, 2017 4:21 PM, "stephen sefick" <ssefick at gmail.com> wrote:
>
> Hello,
>
> I would like to add something to a data frame that is 1) invisible to the
> user, 2) has no side effects, and 3) I can test for in a following
> function. Is this possible? I am exploring classes and attributes and I
> have thought about using a list (but 1 and 2 not satisfied). Any help would
> be greatly appreciated.
>
> I did not provide a reproducible example because I see this as more of a R
> language question, but I will be happy to make a toy example if that would
> help.
>
> I appreciate all of the help.
>
> kindest regards,
>
> --
> Let's not spend our time and resources thinking about things that are so
> little or so large that all they really do for us is puff us up and make us
> feel like gods.  We are mammals, and have not exhausted the annoying little
> problems of being mammals.
>
>                                 -K. Mullis
>
> "A big computer, a complex algorithm and a long time does not equal
> science."
>
>                               -Robert Gentleman
>
>         [[alternative HTML version deleted]]
>
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-- 
Let's not spend our time and resources thinking about things that are so
little or so large that all they really do for us is puff us up and make us
feel like gods.  We are mammals, and have not exhausted the annoying little
problems of being mammals.

                                -K. Mullis

"A big computer, a complex algorithm and a long time does not equal
science."

                              -Robert Gentleman

	[[alternative HTML version deleted]]