In order to output column and row totals, I think the best way is to build it into the data structure in the first place. This means adding a little bit to the "while" loop that is reading the data:
my %from_to_bytes;
my %col_headings;
while (<DATA>) {
( $from, $to, $hh, $mm, $bytes ) = /^(\S+) (\S+) (\d+):(\d+) (\d+)
+$/
or ( warn "bad format on line $.: $_" ), next;
$from_to_bytes{$from}{$to} += $bytes;
$from_to_bytes{$from}{"~~TOTAL"} += $bytes;
$from_to_bytes{"~~TOTAL"}{$to} += $bytes;
$col_headings{$to} = undef;
}
By putting "~~" as the first two characters of the hash key for the column and row totals, those keys will come out last when you sort the keys for output (because tilde comes last in ascii collation). Then you just print the matrix in the normal way, with no further ado:
print join("\t", '', sort keys %col_headings, 'Total'),"\n";
for my $from ( sort keys %from_to_bytes ) {
print (( $from eq '~~TOTAL' ) ? 'Total' : $from );
print "\t$from_to_bytes{$from}{$_}" for (sort keys %{$from_to_byte
+s{$from}});
}
(not tested)
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.