Try this: formatC(c(1, 10, 100), width = 4, flag = '0')
On Fri, Sep 10, 2010 at 5:05 PM, Nick Matzke <[email protected]> wrote: > Hi, > > Is there an easy way to convert numbers into a form such that they all have > the same number of digits? > > e.g.: > "1", "10", and "100" > > ...become... > > "0001", "0010", "0100" etc. > > I ask because I am producing a large number of files that need to sort > consistently by filename. Currently I get this kind of sorting: > > filename1 > filename10 > filename11 > filename12 > filename13 > filename14 > filename15 > filename16 > filename17 > filename18 > filename19 > filename2 > filename20 > filename21 > ...etc.. > > which is annoying. Ideally I'd have: > > filename0001 > filename0002 > filename0003 > filename0004 > filename0005 > filename0006 > filename0007 > filename0008 > filename0009 > filename0010 > filename0011 > ...etc.. > > Basically I want to produce strings like "0010" without an elaborate hack. > > Thanks! > Nick > > > > > -- > ==================================================== > Nicholas J. Matzke > Ph.D. Candidate, Graduate Student Researcher > Huelsenbeck Lab > Center for Theoretical Evolutionary Genomics > 4151 VLSB (Valley Life Sciences Building) > Department of Integrative Biology > University of California, Berkeley > > Graduate Student Instructor, IB200A > Principles of Phylogenetics: Systematics > http://ib.berkeley.edu/courses/ib200a/index.shtml > > Lab websites: > http://ib.berkeley.edu/people/lab_detail.php?lab=54 > http://fisher.berkeley.edu/cteg/hlab.html > Dept. personal page: > http://ib.berkeley.edu/people/students/person_detail.php?person=370 > Lab personal page: http://fisher.berkeley.edu/cteg/members/matzke.html > Lab phone: 510-643-6299 > Dept. fax: 510-643-6264 > Cell phone: 510-301-0179 > Email: [email protected] > > Mailing address: > Department of Integrative Biology > 3060 VLSB #3140 > Berkeley, CA 94720-3140 > > ----------------------------------------------------- > "[W]hen people thought the earth was flat, they were wrong. When people > thought the earth was spherical, they were wrong. But if you think that > thinking the earth is spherical is just as wrong as thinking the earth is > flat, then your view is wronger than both of them put together." > > Isaac Asimov (1989). "The Relativity of Wrong." The Skeptical Inquirer, > 14(1), 35-44. Fall 1989. > http://chem.tufts.edu/AnswersInScience/RelativityofWrong.htm > > ______________________________________________ > [email protected] 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[alternative HTML version deleted]]
______________________________________________ [email protected] 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.
