From f55c7687a5998cdc05ff63134cd1fb398bc8ce24 Mon Sep 17 00:00:00 2001
From: Chris Dyer <cdyer@cs.cmu.edu>
Date: Mon, 16 May 2011 14:29:21 -0400
Subject: proper sampling from unit sphere

---
 vest/line_optimizer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vest/line_optimizer.cc b/vest/line_optimizer.cc
index 70a00cbc..7303df8d 100644
--- a/vest/line_optimizer.cc
+++ b/vest/line_optimizer.cc
@@ -81,7 +81,7 @@ void LineOptimizer::RandomUnitVector(const vector<int>& features_to_optimize,
                                      RandomNumberGenerator<boost::mt19937>* rng) {
   axis->clear();
   for (int i = 0; i < features_to_optimize.size(); ++i)
-    axis->set_value(features_to_optimize[i], rng->next() - 0.5);
+    axis->set_value(features_to_optimize[i], rng->NextNormal(0.0,1.0));
   (*axis) /= axis->l2norm();
 }
 
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