[R] Format integer

[Uwe Ligges]

Anh Tran wrote:
> Thanks. formatC(flag) works.
> 
> But it's awefully slow. I try to do that for 65000 numbers (generating ID
> for each item) and it seems like forever.

On my not that recent laptop:

 > system.time(formatC(1:65000, width=10, flag="0"))
    user  system elapsed
    1.92    0.00    1.94


I think 2 seconds is less than "forever".

Uwe Ligges





> Is there any faster way?
> 
> Thank all.
> 
> Anh Tran
> 
> On Mon, May 12, 2008 at 2:36 PM, Uwe Ligges <
> ligges at statistik.uni-dortmund.de> wrote:
> 
>>
>> Anh Tran wrote:
>>
>>> Hi,
>>> What's one way to convert an integer to a string with preceding 0's?
>>> such that
>>> '13' becomes '00000000013'
>>> to be put into a string
>>>
>>> I've tried formatC, but they removes all the zeros and replace it with
>>> blanks
>>>
>> Not so for me:
>>
>> formatC(13, digits=10, flag="0")
>>
>> Uwe LIgges
>>
>>
>>
>>> Thanks
>>>
>>>
> 
>