[R] Beginner needs help with R

[jim holtman]

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 <nabilaelarbi1912 at 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
>
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>
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