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| author | mguetlein <martin.guetlein@gmail.com> | 2010-07-28 10:08:09 +0200 |
|---|---|---|
| committer | mguetlein <martin.guetlein@gmail.com> | 2010-07-28 10:08:09 +0200 |
| commit | ce0121c8d5e77e8f4cb9654d372a8745e9b3ef10 (patch) | |
| tree | 6f55852336da3b236466c8f5bd7a56d0e9c6af1e /lib/predictions.rb | |
| parent | 2a4fe800d1fad7da3a835f664ce1af864e827c0f (diff) | |
remove rdf_provider to use rewritten owl.rb in wrapper
Diffstat (limited to 'lib/predictions.rb')
| -rw-r--r-- | lib/predictions.rb | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/predictions.rb b/lib/predictions.rb index f6351f8..2873689 100644 --- a/lib/predictions.rb +++ b/lib/predictions.rb @@ -441,8 +441,8 @@ module Lib def sample_correlation_coefficient # formula see http://en.wikipedia.org/wiki/Correlation_and_dependence#Pearson.27s_product-moment_coefficient return ( @num_predicted * @sum_multiply - @sum_actual * @sum_predicted ) / - ( Math.sqrt( @num_predicted * @sum_squares_actual - @sum_actual**2 ) * - Math.sqrt( @num_predicted * @sum_squares_predicted - @sum_predicted**2 ) ) + ( Math.sqrt( [0, @num_predicted * @sum_squares_actual - @sum_actual**2].max ) * + Math.sqrt( [0, @num_predicted * @sum_squares_predicted - @sum_predicted**2].max ) ) end def total_sum_of_squares |