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Full Discussion: How to split this txt file into small files?
Top Forums Shell Programming and Scripting How to split this txt file into small files? Post 302840157 by Don Cragun on Sunday 4th of August 2013 04:39:32 PM
Old 08-04-2013
The following seems to do what you want:
Code:
awk '
FNR == 1 { next } # Skip header.
last != $1","$2","$3","$4 { # Switch to new file.
        if(fn != "") close(fn) # close previous output file.
        fn = sprintf("s%03d_run%d_condition%d_ACC%d", $1, $2, $3, $4) # Set new output file name.
        last = $1","$2","$3","$4 # Save key for new file.
}
{       print > fn } # Add line to split file.
' a.txt

If you want to run this on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk, /usr/xpg6/bin/awk, or nawk.

Note that this script is based on a few assumptions:
  1. The split files should not contain a header line; only data lines.
  2. The input lines for a every combination of subject, run, condtion, and ACC are all adjacent in your input file.
  3. If there are any split output files from a previous run, you want to replace those files rather than append the new data to them.
If any of these assumptions are incorrect, this script will need to be modified.
 

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LEARN ABOUT DEBIAN

platform::shell

platform::shell(3tcl)					       Tcl Bundled Packages					     platform::shell(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4						     platform::shell(3tcl)
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