Place this after shift @f. 
my $row_sum;
@f = grep { $_ } @f;
$row_sum += $_
  for @f;
print "Row average = ", $row_sum / @f, "\n";

[download]

Given:

AAA01,0,0,0,0,0,1
AAA02,0,0,0,0,1,2

[download]

produces:

Row average = 1
Row average = 1.5

[download]

update: Fixed error pointed out here by rayv

In reply to Re^3: Calculating Row Averages From a CSV File by FunkyMonk
in thread Calculating Row Averages From a CSV File by rayv

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