Row tags are pretty straightforward, and work almost like regular tags, except they affect all columns. What sort of thing are you trying to accomplish? Here is a simple example.

#!/usr/bin/perl
use Tk;
use Tk::TableMatrix;

my $mw = MainWindow->new;

my $arrayVar = {};

print "Filling Array...\n";
my ($rows,$cols) = (10, 10);
 foreach my $row  (0..($rows-1)){
    foreach my $col (0..($cols-1)){
      $arrayVar->{"$row,$col"} = "$row,$col";
   }
}

print "Creating Table...\n";

## Test out the use of a callback to define tags on rows and columns
sub colSub{
  my $col = shift;
  return "OddCol" if( $col > 0 && $col%2) ;
}

 my $t = $mw->Scrolled('TableMatrix', -rows => $rows, -cols => $cols,
 -width => 6, -height => 6,
 -titlerows => 1, -titlecols => 1,
 -variable => $arrayVar,
 -coltagcommand => \&colSub,
 -colstretchmode => 'last',
 -rowstretchmode => 'last',
 -selectmode => 'extended',
 -selecttitles => 0,
 -drawmode => 'slow',
 -scrollbars=>'se'
 );


$mw->Button(-text => "Update", -command => \&update_table)
               ->pack(-side => 'bottom',-anchor => 'w');

# hideous Color definitions here:
$t->tagConfigure('active', -bg => 'white', -relief => 'sunken');
$t->tagConfigure('OddCol', -bg => 'lightyellow', -fg => 'black');
$t->tagConfigure('title', -bg => 'lightblue', -fg => 'black', -relief 
+=> 'sunken');
$t->tagConfigure('dis', -state => 'disabled');
$t->pack(-expand => 1, -fill => 'both');
$t->focus;

Tk::MainLoop;

# $t->tagConfigure($anchor, -anchor => $anchor);
# $t->tagRow($anchor, ++$i);
# $t->set( "$i,$first",$anchor);



sub update_table {

        print "1\n";
        $t->tagCell('dis', '1,1' );
        $t->activate('2,2');
        $t->tagRow('active',3);
        
#       $t->configure(-padx =>( $t->cget(-padx)));
#       a trick needed sometimes to update                

}
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