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Top Forums Shell Programming and Scripting Shell script for changing the accession number of DNA sequences in a FASTA file Post 302881563 by RavinderSingh13 on Monday 30th of December 2013 10:34:04 AM
Old 12-30-2013
Hello,

One more approach with sed may help.

Code:
sed 's/\(^>.*_\)\(.*\)/my_desired_text_\2/g' file_name

Output will be as follows.

Code:
my_desired_text_45
atatagcaga
my_desired_text_46
atatagcagaatatatat



Thanks,
R. Singh

---------- Post updated at 11:34 AM ---------- Previous update was at 10:30 AM ----------

One more approach for same as follows.


Code:
awk -vs1="my_desired_ouput_" -F"_" '/^>/ {print s1$NF} !/^>/' file

Output will be as follows.

Code:
my_desired_ouput_45
atatagcaga
my_desired_ouput_46
atatagcagaatatatat


Thanks,
R. Singh
 

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FASTA_FORMATTER(1)						   User Commands						FASTA_FORMATTER(1)

NAME
fasta_formatter - changes the width of sequences line in a FASTA file DESCRIPTION
usage: fasta_formatter [-h] [-i INFILE] [-o OUTFILE] [-w N] [-t] [-e] Part of FASTX Toolkit 0.0.13.2 by gordon@cshl.edu [-h] = This helpful help screen. [-i INFILE] = FASTA/Q input file. default is STDIN. [-o OUTFILE] = FASTA/Q output file. default is STDOUT. [-w N] = max. sequence line width for output FASTA file. When ZERO (the default), sequence lines will NOT be wrapped - all nucleotides of each sequences will appear on a single line (good for scripting). [-t] = Output tabulated format (instead of FASTA format). Sequence-Identifiers will be on first column, Nucleotides will appear on second column (as single line). [-e] = Output empty sequences (default is to discard them). Empty sequences are ones who have only a sequence identifier, but not actual nucleotides. Input Example: >MY-ID AAAAAGGGGG CCCCCTTTTT AGCTN Output example with unlimited line width [-w 0]: >MY-ID AAAAAGGGGGCCCCCTTTTTAGCTN Output example with max. line width=7 [-w 7]: >MY-ID AAAAAGG GGGTTTT TCCCCCA GCTN Output example with tabular output [-t]: MY-ID AAAAAGGGGGCCCCCTTTTAGCTN example of empty sequence: (will be discarded unless [-e] is used) >REGULAR-SEQUENCE-1 AAAGGGTTTCCC >EMPTY-SEQUENCE >REGULAR-SEQUENCE-2 AAGTAGTAGTAGTAGT GTATTTTATAT SEE ALSO
The quality of this automatically generated manpage might be insufficient. It is suggested to visit http://hannonlab.cshl.edu/fastx_toolkit/commandline.html to get a better layout as well as an overview about connected FASTX tools. fasta_formatter 0.0.13.2 May 2012 FASTA_FORMATTER(1)
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