Merge pull request apache#6 from jamesc/master

Fix apache#5 - harmonic mean throws exception when given a set of zero values
cararemixed · Nov 30, 2012 · 0da736b · 0da736b
2 parents b1882d7 + 79782d2
commit 0da736b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/bear.erl b/src/bear.erl
@@ -146,6 +146,9 @@ arithmetic_mean(#scan_result{n=N, sumX=Sum}) ->
 geometric_mean(#scan_result{n=N, sumLog=SumLog}) ->
  math:exp(SumLog/N).
 
+harmonic_mean(#scan_result{sumInv=0}) ->
+ %% Protect against divide by 0 if we have all 0 values
+ 0;
 harmonic_mean(#scan_result{n=N, sumInv=Sum}) ->
  N/Sum.