faster construction of features with intercept

yinxusen · Mar 17, 2014 · a1439c2 · a1439c2
1 parent dc96546
commit a1439c2
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/GeneralizedLinearAlgorithm.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/GeneralizedLinearAlgorithm.scala
@@ -136,13 +136,13 @@ abstract class GeneralizedLinearAlgorithm[M <: GeneralizedLinearModel]
 
     // Add a extra variable consisting of all 1.0's for the intercept.
     val data = if (addIntercept) {
-      input.map(labeledPoint => (labeledPoint.label, Array(1.0, labeledPoint.features:_*)))
+      input.map(labeledPoint => (labeledPoint.label, labeledPoint.features.+:(1.0)))
     } else {
       input.map(labeledPoint => (labeledPoint.label, labeledPoint.features))
     }
 
     val initialWeightsWithIntercept = if (addIntercept) {
-      Array(1.0, initialWeights:_*)
+      initialWeights.+:(1.0)
     } else {
       initialWeights
     }