On Thu, Aug 04, 2011 at 02:33:19PM +0530, VinoRex.E wrote:
> Hi
> i am a beginner in Perl i have a pdb file containing the X,Y,and Z
> coordinates of atoms example given below. the data extends upto 1000 atoms
> and its coordinates. I need a perl program to export these data into excel
> worksheet into distinct columns and ROws.
> 
> ATOM      1  N   GLY A   2       1.888  -8.251  -2.511  1.00 36.63
> N
> ATOM      2  CA  GLY A   2       2.571  -8.428  -1.248  1.00 33.02
> C
> ATOM      3  C   GLY A   2       2.586  -7.069  -0.589  1.00 30.43
> C

Here's one way:

#!/usr/bin/perl
#   convert raw data file to *.csv which can be loaded by Excel

use strict;     #   this can be removed when all bugs are fixed
use warnings;   #   more control than -w

my ($str, @fields);

open my $fh, '<', 'data.pdb' or die "Unable to open DATA: $!";
while( my $line = <$fh> )
{   chomp $line;
    @fields = split /\s+/, $line;
    if( @fields == 1 )
    {   $str .= "," . $line;
        print $str, "\n";
    }
    else
    {   $str = join ",", @fields;
    }
}
close $fh;

Mike
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