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-rw-r--r--lib/lazar.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/lazar.rb b/lib/lazar.rb
index f88c695..f849a48 100644
--- a/lib/lazar.rb
+++ b/lib/lazar.rb
@@ -149,7 +149,7 @@ module OpenTox
# AM: transform to cosine space
@min_sim = (@min_sim.to_f*2.0-1.0).to_s if @similarity_algorithm =~ /cosine/
@training_activities = @training_dataset.data_entries.collect{|entry|
- act = entry[prediction_feature_pos]
+ act = entry[prediction_feature_pos] if entry
@prediction_feature.feature_type=="classification" ? @prediction_feature.value_map.invert[act] : act
}