Re: [Sheflug] Extracing data from a file

["Chris J" <xxxxx [at] xxxxxxxxxxxx>]

> After each of these records, a new one is found. I want to split
> this single file into a number of files. Each new file will have the
> name id_string, and the content of the file will be exactly the same
> record that is present in the initial file. The number of a,b data
> points is specified by N (there are N a and N b points).

Something like ...

###################################################################
#!/usr/bin/perl

use strict;

my ($file, $thing, $count, $i, $pair);

while ($file = <>)
{
        open (FILE, ">$file") or die "Cannot open $file";
        $thing = <>;
        print FILE $thing;
        $count = <>;
        print FILE $count;
        for ($i = 0; $i < $count; $i++) {
                $pair = <>;
                print FILE $pair;
        }
        close FILE;
}
####################################################################

but I don't quite grok the meaning of the last line of the record:

	a_{N/2},b[N/2}

so adding that to the script is left as an exercise for the reader :-)

This could probably be improved ten-fold but my Perl's a little rusty, so 
you'll have to take this :)

cut & paste into a script (say, splitit), chmod, then invoke as:
	
	/path/to/script/splitit < /path/to/input/file

Files will be created in current directory. The script also has no error 
checking, so if there is one corrupt record (eg, where N != number of 
records), it'll get lost. You might be able to make use of the last line to 
act as an end-of-record marker so the script can keep its sanity.

Chris...

-- 
\ Chris Johnson           \ NP: Delerium - 02. Inside the Chamber
 \ cej [at] nightwolf.org.uk    ~-----,   
  \ http://cej.nightwolf.org.uk/  ~-----------------------------------, 
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