[R] convert one digit numbers to two digits one

[Bert Gunter]

(Assuming I understand) tons of ways of doing this.

So I'll just point out the
?nchar
function, which you can use to count characters in your tail end and
paste a "0" if there's only one, e.g. via ifelse() .

-- Bert

On Wed, Nov 6, 2013 at 8:25 AM, Alaios <alaios at yahoo.com> wrote:
> Hi all,
> the following returns the hour and the minutes
>
> paste(DataSet$TimeStamps[selectedInterval$start,4], DataSet$TimeStamps[selectedInterval$start,5],sep=":")
> [1] "12:3"
>
> the problem is that from these two I want to create a time stamp so 12:03. The problem is that the number 3 is not converted to 03. Is there an easy way when I have one digit integer to add a zero in the front? Two digits integers are working fine so far, 12:19, or 12:45 would appear correctly
>
> I would like to thank you in advance for your help
>
> Regards
> Alex
>         [[alternative HTML version deleted]]
>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

(650) 467-7374