[R] Does this exist: diff(range(VAR, na.rm=T))

[Rui Barradas]

Hello,

I know that this is not what you want but cases like this are when 
personal packages make life easier.
They don't have to be contributed packages, they are more of a 
collection of personal habits.



span <- function(x, na.rm = FALSE) diff(range(x, na.rm = na.rm))



min, max, range and others default to na.rm = FALSE. Change at will.

Hope this helps,

Rui Barradas



Às 20:34 de 25/06/2025, Dennis Fisher escreveu:
> you are missing the point:
> 	span(…)
> requires less typing than
> 	diff(range(….))
> 
> just like
> 	paste0
> simplifies use of the paste command
> 
> 
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone: 1-415-307-4791
> www.PLessThan.com
> 
>> On Jun 25, 2025, at 12:32 PM, Ebert,Timothy Aaron <tebert using ufl.edu> wrote:
>>
>> I do not see the problem.
>> In base R
>> Min <- min(var, na.rm=T)
>> Max <- max(var, na.rm=T)
>> Span <- c(Min, Max)
>>
>> Is the same output as
>> Span <- range(var, na.rm=T)
>>
>> diff(range(var, na.rm=T)) returns Max - Min
>>
>> range() returns a vector with two values, the minimum and the maximum.
>> What should the function "span" do that is not already done?
>>
>> Tim
>>
>> -----Original Message-----
>> From: R-help <r-help-bounces using r-project.org <mailto:r-help-bounces using r-project.org>> On Behalf Of Dennis Fisher
>> Sent: Wednesday, June 25, 2025 2:11 PM
>> To: r-help <r-help using r-project.org <mailto:r-help using r-project.org>>
>> Subject: [R] Does this exist: diff(range(VAR, na.rm=T))
>>
>> [External Email]
>>
>> Version 4.4.2
>> OS X
>>
>> Colleagues
>>
>> I often need to determine the span of the x-variable in a graphic.
>>
>> This is easy to determine with:
>>         diff(range(VAR, na.rm=T))
>>
>> I am not aware of any function in base R that accomplishes this and "span" is not taken.
>>
>> Would it be possible to add such a function?  Not a major addition but often useful.
>>
>> Dennis
>>
>> Dennis Fisher MD
>> P < (The "P Less Than" Company)
>> Phone: 1-415-307-4791
>> http://www.plessthan.com/
>>
>>
>>         [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help using r-project.org <mailto:R-help using r-project.org> mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide https://www.r-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide https://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.


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