Background: Window Excel supports maximum 256 columns or 64K rows. Many of our CSV files were generated with 30~60 rows and 1000~2500 columns. So it can't be fed to excel directly.

I would like to invert row and columns as following: 

#!/usr/bin/perl
my @data;
while (<DATA>) {
  chomp;
  push @data,[split /,/];
}

for my $z ( 0 .. $#data ) {
    for my $v ( 0 .. $#{$data[$z]} ) {
    print "$data[$v][$z],";
    }
    print "\n";
}

__DATA__
Date,a,b,c,d,e,f
Mon-1,11,12,13,14,15,16
Mon-2,21,22,23,24,25,26
Tue-1,31,,33,34,35,36
Tue-2,41,42,,44,45,46
Wed-1,51,52,53,54,55,56
Wed-2,61,62,63,64,65,66

[download]

Everything appears working fine

When I run it against the csv file, it can't convert all columns to row. I am puzzled by the behavior. It may be related to the csv content. Here is a small portion of one csv file

===

,/dir/dir1/file1,/dir/dir1/dir3,/dir/dir1/file2,/dir/dir1/file3,/dir/dir1/dir2,.....(up to 1000-2000 diretory or filename)

May-1,34,44,44,443,68,93,,,,,993,9,2,,,,13343,...(up to 1000-2000 columns)

May-2,343,343,,343,343,,,,4343,5,56,,,,,,........

May-3,3030...

....

May-30....

===

I like to see output like:

May-1,May-2,May-3,May-.......,May-30
/dir/dir1/file1,3,34,,,,34,.......
/dir/dir1/dir3,.....
/dir/dir1/file2,....
/dir/dir1/file3,...
/dir/dir1/dir2....
..up to 1000-2000 rows..

[download]
Thanks for your comments,

carl

In reply to Invert CSV by roadtest

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