Selectively splitting a file with C-shell?

[fusi0n]

I have a rather long csh script that works, but it's terribly ungraceful and takes a while from various loops. I only know enough code to get myself into trouble, so I'm looking for some guidance.

I have a large file that is separated at regular intervals by the same line, like this:

@<TRIPOS>molecule
name_000
blah
yadda
stuff
@<TRIPOS>molecule
name_001
blah2
yadda2
stuff2
@<TRIPOS>molecule
name_002
blah3
...

and so on for up to name_200

I need to split this file into individual files, named name_000.mol2, name_001.mol2, name_002.mol2 etc, each of which contain:

@<TRIPOS>molecule
name_000 (or name_whatever)
blah
yadda
stuff

Currently I grep -n 'TRIPOS>molecule' the big file into another file, then use the line numbers to cycle through and pull out lines x through y, naming each file based on what's in line x+1 (name_000), with .mol2 on the end. This takes an incredibly long time, and is rather clunky. I don't know if it's the file cycling or all the variables I pass back and forth that eats up the time, but if anyone knows of an easier way to split the big file up, I would greatly appreciative!

Any ideas?

Thanks!

 

[PHV]

man awk

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[fusi0n]

I tried previously, but couldn't figure out a better solution using awk as the line numbers between each @<TRIPOS>molecule separator vary, as do the number of entries in the file.

I'll go back and try again though.

 

[columb]

Something along the lines of

while read line
do
  [[ $line = '@<TRIPOS>molecule' ]] && continue
  case $line in
    name_* )
      OUTFILE=${name}.mol2
      echo '@<TRIPOS>molecule' > $OUTFILE
      echo $line >> $OUTFILE
      ;;
    *) echo $line >> $OUTFILE
  esac
done < infile

If any of the lines in infile contain spaces add

IFS='
'

before the loop
Not tested but I think you'll get the idea.

Ceci n'est pas une signature
Columb Healy

 

[columb]

Sorry - one more thing - I know you specified 'C' shell - but run this under ksh

Ceci n'est pas une signature
Columb Healy

 

[fusi0n]

Unfortunately, I need to run this script under csh (or I have to convert a lot of other code too), BUT this does give me some good ideas about where to go from here.

Thanks so much!