[mlpack] 129/149: Handle negative gradient values correctly.

[Barak A. Pearlmutter]

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bap pushed a commit to branch svn-trunk
in repository mlpack.

commit f894bde22535a8409af06c66d6a7df5ea3ab717b
Author: rcurtin <rcurtin at 9d5b8971-822b-0410-80eb-d18c1038ef23>
Date:   Tue Dec 2 18:25:46 2014 +0000

    Handle negative gradient values correctly.
    
    
    git-svn-id: http://svn.cc.gatech.edu/fastlab/mlpack/trunk@17429 9d5b8971-822b-0410-80eb-d18c1038ef23
---
 src/mlpack/tests/regularized_svd_test.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mlpack/tests/regularized_svd_test.cpp b/src/mlpack/tests/regularized_svd_test.cpp
index 06e9e8c..1cbb741 100644
--- a/src/mlpack/tests/regularized_svd_test.cpp
+++ b/src/mlpack/tests/regularized_svd_test.cpp
@@ -176,12 +176,12 @@ BOOST_AUTO_TEST_CASE(RegularizedSVDFunctionGradient)
       parameters(i, j) += epsilon;
 
       // Compare numerical and backpropagation gradient values.
-      if (gradient1(i, j) <= 1e-6)
+      if (std::abs(gradient1(i, j)) <= 1e-6)
         BOOST_REQUIRE_SMALL(numGradient1, 1e-5);
       else
         BOOST_REQUIRE_CLOSE(numGradient1, gradient1(i, j), 1e-2);
 
-      if (gradient2(i, j) <= 1e-6)
+      if (std::abs(gradient2(i, j)) <= 1e-6)
         BOOST_REQUIRE_SMALL(numGradient2, 1e-5);
       else
         BOOST_REQUIRE_CLOSE(numGradient2, gradient2(i, j), 1e-2);

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