[R] number of decimal

[Peter Ehlers]

Looks like I didn't read your post carefully enough.
If you want some sort of global option to set the
display of numbers from any operation performed by R
then that's not likely to be possible without
capturing all output and formatting it yourself.
As the saying goes 'good luck with that'.

Note that options(digits=..) won't give you the
requested number of digits in all parts of, say,
print(t.test(x,y)).

  -Peter Ehlers

Peter Ehlers wrote:
> Ivan Calandra wrote:
>> It looks to me that it does more or less the same as format().
>>
>> Maybe I didn't explain myself correctly then. I would like to set the 
>> number of decimal by default, for the whole R session, like I do with 
>> options(digits=6). Except that digits sets up the number of digits 
>> (including what is before the "."). I'm looking for some option that 
>> will let me set the number of digits AFTER the "."
>>
>> Example: I have 102.33556677 and 2.999555666
>> If I set the number of decimal to 6, I should get: 102.335567 and 
>> 2.999556.
>> And that for all numbers that will be in/output from R (read.table, 
>> write.table, statistic tests, etc)
>>
>> Or is it that I didn't understand everything about formatC() and 
>> sprintf()?
> You didn't:
> 
> formatC(x, digits=6, format="f")
> [1] "102.335567" "2.999556"
> 
> sprintf("%12.6f", x)
> [1] "  102.335567" "    2.999556"
> 
>  -Peter Ehlers
> 
>  >
>>
>> Thanks again
>> Ivan
>>
>> Le 1/28/2010 15:12, Peter Ehlers a écrit :
>>> ?formatC
>>> ?sprintf
>>>
>>> Ivan Calandra wrote:
>>>> Hi everybody,
>>>>
>>>> I'm trying to set the number of decimals (i.e. the number of digits 
>>>> after the "."). I looked into options but I can only set the total 
>>>> number of digits, with options(digits=6). But since I have different 
>>>> variables with different order of magnitude, I would like that 
>>>> they're all displayed with the same number of decimals.
>>>> I searched for it and found the format() function, with nsmall=6, 
>>>> but it is for a given vector. I would like to set it for the whole 
>>>> session, as with options.
>>>>
>>>> Can anyone help me?
>>>> Thanks in advance
>>>> Ivan
>>>>
>>>> ______________________________________________
>>>> R-help at r-project.org mailing list
>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>> PLEASE do read the posting guide 
>>>> http://www.R-project.org/posting-guide.html
>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>
>>>>
>>
>>
> 

-- 
Peter Ehlers
University of Calgary