I have gone over all of the posts on this site, but I must
be doing something wrong because I get the following error:
"Can't use string("1") as a HASH ref while strict subs is on..."

I'm trying to create a matrix of authors who have
shared a thread, the 0 for never shared and 1+ for the
number of threads shared. 

# get list of every author
foreach $from (sort keys %authors) {
  foreach $subject(keys %subjects) {
    # populate buddy list
    @buddies = split(/\t/, $subjects{$subject});
    # add each $buddy to %authors{$author} hash
    foreach $buddy(@buddies) {
        #this doesn't work
        # i want to add the buddy relationship if it does
        # not exist, else I want to increment the value
    ${$authors{$from}}{$buddy}++;
    }
}

[download]

Thanks a lot in advance.

update (broquaint): s|<(/)?pre>|<${1}code>|g

In reply to Adding values to a hash of hashes by suzka99

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