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]]
Have a look at ?formatC On Mon, Apr 4, 2011 at 11:35 AM, Yan Jiao <y.jiao@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]] > > ______________________________________________ > R-help@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. >[[alternative HTML version deleted]]
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.jiao at 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]] > > ______________________________________________ > 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. >-- -------- Dr. January Weiner 3 -------------------------------------- Max Planck Institute for Infection Biology Charit?platz 1 D-10117 Berlin, Germany Web?? : www.mpiib-berlin.mpg.de Tel? ?? : +49-30-28460514
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]] > > ______________________________________________ > 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.