> On Feb 6, 2017, at 9:08 AM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > > I think it is important to point out that whenever R treats a number as a > numeric (integer or double) it loses any base 10 concept of "leading zero" in > that internal representation, so in this expression > > seq2 <- paste0("DQ", sprintf("%06d", seq(060054, 060060)))
You can do it just with sprintf (and presumably with formatC as well) if you add a leading "DQ" to the format string.: > sprintf( "DQ%06s", seq(060054, 060060)) [1] "DQ060054" "DQ060055" "DQ060056" "DQ060057" "DQ060058" "DQ060059" "DQ060060" -- David. > the arguments to seq have leading zeros that are ignored by R and have > nothing to do with getting the desired output. That is, the same result can > be obtained using > > seq2 <- paste0("DQ", sprintf("%06d", seq(60054, 60060))) > > or > > seq2 <- paste0("DQ", sprintf("%06d", seq(0060054, 00060060))) > > since only the zero inside the format string is key to success. (If it makes > you more comfortable to put the zero there for readability that is your > choice, but R ignores therm.) > > Also note that the paste0 function is not needed when you use sprintf: > > seq2 <- sprintf("DQ%06d", seq(60054, 60060)) > > or > > myprefix <- "DQ" > seq2 <- sprintf("%s%06d", myprefix,seq(60054, 60060)) > > -- > Sent from my phone. Please excuse my brevity. > > On February 6, 2017 5:45:43 AM PST, jim holtman <jholt...@gmail.com> wrote: >> You need the leading zeros, and 'numerics' just give the number without >> leading zeros. You can use 'sprintf' for create a character string >> with >> the leading zeros: >> >>> # this is using 'numeric' and drops leading zeros >>> >>> seq1 <- paste("DQ", seq(060054, 060060), sep = "") >>> seq1 >> [1] "DQ60054" "DQ60055" "DQ60056" "DQ60057" "DQ60058" "DQ60059" >> "DQ60060" >>> >>> # use 'sprintf' to create leading zeros >>> seq2 <- paste0("DQ", sprintf("%06d", seq(060054, 060060))) >>> seq2 >> [1] "DQ060054" "DQ060055" "DQ060056" "DQ060057" "DQ060058" "DQ060059" >> "DQ060060" >>> >> >> >> Jim Holtman >> Data Munger Guru >> >> What is the problem that you are trying to solve? >> Tell me what you want to do, not how you want to do it. >> >> On Sun, Feb 5, 2017 at 8:50 PM, Nabila Arbi >> <nabilaelarbi1...@gmail.com> >> wrote: >> >>> Dear R-Help Team! >>> >>> I have some trouble with R. It's probably nothing big, but I can't >> find a >>> solution. >>> My problem is the following: >>> I am trying to download some sequences from ncbi using the ape >> package. >>> >>> seq1 <- paste("DQ", seq(060054, 060060), sep = "") >>> >>> sequences <- read.GenBank(seq1, >>> seq.names = seq1, >>> species.names = TRUE, >>> gene.names = FALSE, >>> as.character = TRUE) >>> >>> write.dna(sequences, "mysequences.fas", format = "fasta") >>> >>> My problem is, that R doesn't take the whole sequence number as >> "060054" >>> but it puts it as DQ60054 (missing the zero in the beginning, which >> is >>> essential). >>> >>> Could please tell me, how I can get R to accepting the zero in the >>> beginning of the accession number? >>> >>> Thank you very much in advance and all the best! >>> >>> Nabila >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>> 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]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.