Re: Creating Reports with hashes: Use of uninitialized value while adding integers

[toolic]

If I change:

            my $quant = $tree_collection{$years}{$trees}{$size} || "-"
+;

to:

            my $quant = $tree_collection{$years}{$trees}{$size} || 0;

One group of your warning messages goes away:

Argument "-" isn't numeric in addition (+)

You must decide if this still gives you the output you need.