split file when integer is found

[ste2703]

hallo folk..

Here is my problem.
I have a file in which contains one line with a lot floating points.
In the very first place and some times in the downstream, there are a few integers, surrounded by blank spaces.

1 1.02-4 1.03-5 544 1.04-1 65 2.98-1 5.78-10 3.45-2 etc etc

I aim to split the file in more files each of them containing an integer and the following floatings until the next integer.

I tried something like that:

sed -n 's/[0-9]+ /&/w output.file' < input.file
csplit -k -f output.file input.file '/\s[0-9]+\s/'

It seems that my regex doesn't work.
I also tried with POSIX, without succeeding.

Any suggestion?

Thanks
Stefano

[drl]

Hi, Stefano.

... I have a file in which contains one line with a lot floating points.
In the very first place and some times in the downstream, there are a few integers, surrounded by blank spaces.

1 1.02-4 1.03-5 544 1.04-1 65 2.98-1 5.78-10 3.45-2 etc etc

I aim to split the file in more files each of them containing an integer and the following floatings until the next integer ... Any suggestion?

Here is one solution. This script has 3 parts, first some code to show the environment, versions, and data file; second, an awk script to do the work; third, the results:

#!/usr/bin/env bash

# @(#) s3	Demonstrate split into files at integer string.

# Infrastructure details, environment, commands for forum posts. 
# Uncomment export command to run script as external user.
# export PATH="/usr/local/bin:/usr/bin:/bin"
set +o nounset
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe ; pe "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
pe "(Versions displayed with local utility \"version\")"
c=$( ps | grep $$ | awk '{print $NF}' )
version >/dev/null 2>&1 && s=$(_eat $0 $1) || s=""
[ "$c" = "$s" ] && p="$s" || p="$c"
version >/dev/null 2>&1 && version "=o" $p printf specimen awk
set -o nounset
pe

# Remove files from previous runs.
rm -f section.*

FILE=${1-data1}

# Display sample of data file, with head & tail as a last resort.
pe " || start [ first:middle:last ]"
specimen $FILE \
|| { pe "(head/tail)"; head -n 5 $FILE; pe " ||"; tail -n 5 $FILE; }
pe " || end"

pl " Results, files created:"
awk '
BEGIN { file_index = 1 ; collection = "" }
      {
        for (i = 1; i <= NF; i++) {
          if ( collection == "" ) { # assume integer start
            collection = $i
            } else {
            if ( $i !~ /^[0-9]+$/ ) {
              collection = collection " " $i
              } else {
              print collection > "section." file_index
              close("section." file_index)
              collection = $i
              file_index++
            }
          }
        }
      }
END   { print collection > "section." file_index } # write last file
' $FILE

ls -lgG section.*

pl " Contents of files:"
for i in section.*
do
  printf " %s: " $i
  cat $i
done

exit 0

producing:

% ./s3

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39
printf - is a shell builtin [bash]
specimen (local) 1.17
GNU Awk 3.1.5

 || start [ first:middle:last ]
Whole: 5:0:5 of 1 lines in file "data1"
1 1.02-4 1.03-5 544 1.04-1 65 2.98-1 5.78-10 3.45-2
 || end

-----
 Results, files created:
-rw-r--r-- 1 16 Jun 26 09:06 section.1
-rw-r--r-- 1 11 Jun 26 09:06 section.2
-rw-r--r-- 1 25 Jun 26 09:06 section.3

-----
 Contents of files:
 section.1: 1 1.02-4 1.03-5
 section.2: 544 1.04-1
 section.3: 65 2.98-1 5.78-10 3.45-2

Best wishes ... cheers, drl