[R] increase or decrease variable by 1

[Bert Gunter]

Ted:

Inline below...

On Tue, Dec 7, 2010 at 8:42 AM, Ted Harding <ted.harding at wlandres.net> wrote:
> Indeed!
>
>  x <- x + 1
>
> (and being generous with unnecessary spaces) uses 10 characters.
>
>  `+`(x)<-1
>
> (being mean with them) uses 9. The "mean" version of the first
> uses only 6: x<-x+1
>
> However, I suppose there is merit in the spiritual exercise
> of contemplating how `+`(x)<-1 gets worked out!

AFAICS it doesn't.
> `+`(x)<-1
Error in +x <- 1 : could not find function "+<-"

`+`(x,1) does:

> `+`(x,1)
[1] 4

-- Bert



>
> Ted.
>
> On 07-Dec-10 16:23:17, Ivan Calandra wrote:
>> x+1 is not that complicated... Am I missing something here?
>>
>> Le 12/7/2010 16:55, Gabor Grothendieck a écrit :
>>> On Tue, Dec 7, 2010 at 8:43 AM, madr<madrazel at interia.pl>  wrote:
>>>> many languages have shorthands for that operation like:
>>>>
>>>> variable += 1
>>>> or
>>>> ++variable
>>>>
>>>> is there something like that in R ?
>>>
>>> You can do this:
>>>
>>>> x<- 3
>>>> `+`(x)<- 1
>>>> x
>>> [1] 4
>> --
>> Ivan CALANDRA
>
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> Date: 07-Dec-10                                       Time: 16:42:44
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-- 
Bert Gunter
Genentech Nonclinical Biostatistics