Improvement: function cut

Re your objection that "the user has to suspect that some values were not included" applies equally to your proposed warn option. There are a lot of ways to introduce NAs... in real projects all analysts should be suspecting this problem.

On September 17, 2021 3:01:35 PM PDT, Leonard Mada via R-help <r-help at r-project.org> wrote:

Thank you Andrew.


Is there any reason not to make: include.lowest = TRUE the default?


Regarding the NA:

The user still has to suspect that some values were not included and run
that test.


Leonard


On 9/18/2021 12:53 AM, Andrew Simmons wrote:

Regarding your first point, argument 'include.lowest' already handles
this specific case, see ?.bincode

Your second point, maybe it could be helpful, but since both
'cut.default' and '.bincode' return NA if a value isn't within a bin,
you could make something like this on your own.
Might be worth pitching to R-bugs on the wishlist.



On Fri, Sep 17, 2021, 17:45 Leonard Mada via R-help
<r-help at r-project.org <mailto:r-help at r-project.org>> wrote:

     Hello List members,


     the following improvements would be useful for function cut (and
     .bincode):


     1.) Argument: Include extremes
     extremes = TRUE
     if(right == FALSE) {
     ??? # include also right for last interval;
     } else {
     ??? # include also left for first interval;
     }


     2.) Argument: warn = TRUE

     Warn if any values are not included in the intervals.


     Motivation:
     - reduce risk of errors when using function cut();


     Sincerely,


     Leonard

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