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Full Discussion: How to parse a string efficiently
Top Forums Shell Programming and Scripting How to parse a string efficiently Post 302194620 by sandiego_coder on Tuesday 13th of May 2008 09:53:46 AM
Old 05-13-2008
How to parse a string efficiently
I am new to the boards and to shell programming and have a requirement to name new files received with a unique sequence number. I need to look at a particular file pattern that exists and then to increment a sequence by 1 and write the new file.

Example of file names and sequence #

part1_part2_part3_datesequence.dat
or
part1_part2_part3_part4_datesequence.dat

the sequence is a 6 digit right justified 0 filled number attached to the date - 20080501000001.dat, but may be the 4th, 5th, 6th or 7th token of the filename.

I have a script that creates the new files, but I am having trouble with how to efficiently extract the sequence number in order to increment it by 1 for a given file pattern and date and then write the new file.

Any help would be appreciated and I am trying to stay with shell or sed or awk as I do not have access to perl.

thanks!

Mike
 

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LEARN ABOUT DEBIAN

g_wheel

g_wheel(1)					 GROMACS suite, VERSION 4.5.4-dev-20110404-bc5695c					g_wheel(1)

NAME

       g_wheel - plots helical wheels

       VERSION 4.5.4-dev-20110404-bc5695c

SYNOPSIS

       g_wheel -f nnnice.dat -o plot.eps -[no]h -[no]version -nice int -r0 int -rot0 real -T string -[no]nn

DESCRIPTION

	 g_wheel plots a helical wheel representation of your sequence.  The input sequence is in the  .dat file where the first line contains the
       number of residues and each consecutive line contains a residue name.

FILES

       -f nnnice.dat Input
	Generic data file

       -o plot.eps Output
	Encapsulated PostScript (tm) file

OTHER OPTIONS

       -[no]hno
	Print help info and quit

       -[no]versionno
	Print version info and quit

       -nice int 19
	Set the nicelevel

       -r0 int 1
	The first residue number in the sequence

       -rot0 real 0
	Rotate around an angle initially (90 degrees makes sense)

       -T string
	Plot a title in the center of the wheel (must be shorter than 10 characters, or it will overwrite the wheel)

       -[no]nnyes
	Toggle numbers

SEE ALSO

       gromacs(7)

       More information about GROMACS is available at <http://www.gromacs.org/>.

								  Mon 4 Apr 2011							g_wheel(1)
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