Viral, This should work, yet get a vector of texts a<-1:150 b<-ifelse(a<100,ifelse(a<10,"00","0"),"") paste(b,a,sep="") Best regards, Joseph Joseph Poj Gavinlertvatana Doctoral student, Marketing Harvard Business School Wyss Hall, Soldiers Field, Boston, MA 02163 Ph?? 617.230.5907 Fx?? 617.496.4397 Txt/Vm 617.910.0563 Em pgavinlertvatana at hbs.edu From: gov2001-l-bounces at lists.fas.harvard.edu [mailto:gov2001-l-bounces at lists.fas.harvard.edu] On Behalf Of Viral Gandhi Sent: Monday, May 10, 2010 9:20 AM To: Class List for Gov 2001/E-2001 Subject: [gov2001] 3 digit numbers Hi guys, Does anyone know how to make R write a list like this: 001 002 003 ... 099 100 101 102 i.e. make all the numbers in the sequence have 3 digits. Thanks, Viral _______________________________________________ gov2001-l mailing list gov2001-l at lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l