[R] add zero in front of numbers

Dear R users, I need to add 0 in front of a series of numbers, e.g. 1-001, 19-019, Is there a fast way of doing that? Many thanks yan [[alternative HTML version deleted]] __ R-help@r-project.org mailing list

Re: [R] add zero in front of numbers

Have a look at ?formatC On Mon, Apr 4, 2011 at 11:35 AM, Yan Jiao y.j...@ucl.ac.uk wrote: Dear R users, I need to add 0 in front of a series of numbers, e.g. 1-001, 19-019, Is there a fast way of doing that? Many thanks yan [[alternative HTML version deleted]]

Re: [R] add zero in front of numbers

Dear Yan, apart from formatC, you can also use sprintf, which works almost exactly like the C sprintf function. To convert an integer x to a string with 5 leading 0s, you do: sprintf( %05d, x ) Best regards, j. On Mon, Apr 4, 2011 at 12:35 PM, Yan Jiao y.j...@ucl.ac.uk wrote: Dear R users,

Re: [R] add zero in front of numbers

On 04.04.2011 12:35, Yan Jiao wrote: Dear R users, I need to add 0 in front of a series of numbers, e.g. 1-001, 19-019, Is there a fast way of doing that? formatC(c(1, 19), flag=0, width=3) Uwe Ligges Many thanks yan [[alternative HTML version deleted]]