diff options
Diffstat (limited to 'lib/mongrel/stats.rb')
| -rw-r--r-- | lib/mongrel/stats.rb | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/mongrel/stats.rb b/lib/mongrel/stats.rb index 9e8bf7c..be78741 100644 --- a/lib/mongrel/stats.rb +++ b/lib/mongrel/stats.rb @@ -74,7 +74,11 @@ class Stats # Calculates the standard deviation of the data so far. def sd # (sqrt( ((s).sumsq - ( (s).sum * (s).sum / (s).n)) / ((s).n-1) )) - Math.sqrt( (@sumsq - ( @sum * @sum / @n)) / (@n-1) ) + begin + return Math.sqrt( (@sumsq - ( @sum * @sum / @n)) / (@n-1) ) + rescue Errno::EDOM + return 0.0 + end end |