perl makeRatioDebVisMat.pl       >n-out-deb.txt
perl makeRatioTriAgain.pl        >n-out-tri.txt
perl makeRatioTriAliasAgain.pl   >n-out-ali.txt
perl makeRatioTreAgain.pl        >n-out-tre.txt

$ md5sum n-out*txt
40b87695df5c3f839717dfb3538c029b *n-out-ali.txt
40b87695df5c3f839717dfb3538c029b *n-out-deb.txt
40b87695df5c3f839717dfb3538c029b *n-out-tre.txt
40b87695df5c3f839717dfb3538c029b *n-out-tri.txt
##</code><code>##

#!/usr/bin/perl --
## by us
## perltidy -olq  -csc -csci=10 -cscl="sub : BEGIN END if " -otr -opr -ce -nibc -i=4 -pt=0   "-nsak=*"
#!/usr/bin/perl --
use strict;
use warnings;
use Data::Dump qw/ dd /;
Main( @ARGV );
exit( 0 );

sub Main {
    UsedToBeJustDoWork();
}

sub UsedToBeJustDoWork {
    my $d_h = [
        [ 287.41, 217.76, 231.21, 746.84,  661.86,   812.52 ],
        [ 503.91, 579.54, 418.29, 1613.59, 1689.682, 1542.565 ],
        [ 288.69, 358.43, 231.10, 817.81,  996.18,   763.18 ],
    ];
    my $ratio_ref = makeRatioTreAgain( $d_h );
    dd( $ratio_ref );
}

sub makeRatioTreAgain {
    my( $d_h )  = @_;
    my $rows    = $#$d_h;             ## last index of array
    my $columns = $#{ $d_h->[0] };    ## last index of first row
    my @ratio;

    for my $six ( 0 .. $columns ) {
        TreAgain( $six, $rows, \@ratio, $d_h );
        print "\n";
    }

    return \@ratio;
} ## end sub makeRatioTreAgain

sub TreAgain {
    my( $six, $rows, $ratio_ref, $d_h ) = @_;

    for my $tre ( 0 .. $rows ) {
        ddebuggering( $ratio_ref );
        TriAgain( $six, $tre, $rows, $ratio_ref, $d_h );
    }
}

sub TriAgain {
    my( $six, $tre, $rows, $ratio, $d_h ) = @_;
    for my $tri ( 0 .. $rows ) {
        DebugVisualMatching( $six, $tri, $tre );
## used to be
#~         $ratio[ $six ][ $tri ][ $tre ] = $$d_h[ $tri ][ $six ] / $$d_h[ $tre ][ $six ] ;
## can be written as
#~         $ratio->[ $six ][ $tri ][ $tre ] = $$d_h[ $tri ][ $six ] / $$d_h[ $tre ][ $six ] ;
## or as
        $$ratio[$six][$tri][$tre] = $$d_h[$tri][$six] / $$d_h[$tre][$six];
    }
} ## end sub TriAgain

sub DebugVisualMatching {
    my( $six, $tri, $tre ) = @_;
## for visual matching
    printf 'my $ratio%d_%d_%d  = $$d_h[%d][%d] / $$d_h[%d][%d];' . "\n",
      1 + $six, 1 + $tri, 1 + $tre,
      $tri, $six,
      $tre, $six,
      ;
}

sub ddebuggering { warn Data::Dump::pp( @_ ), "\n"; }