From 4365a48748b3aeb6c15178b8471b1a5a8e0e9802 Mon Sep 17 00:00:00 2001
From: Hauke Heibel <hauke.heibel@gmail.com>
Date: Tue, 26 Jan 2010 19:42:17 +0100
Subject: Added an ei_linspaced_op to create linearly spaced vectors. Added
 setLinSpaced/LinSpaced functionality to DenseBase. Improved vectorized
 assignment - overcomes MSVC optimization issues. CwiseNullaryOp is now
 requiring functors to offer 1D and 2D operators. Adapted existing functors to
 the new CwiseNullaryOp requirements. Added ei_plset to create packages as [a,
 a+1, ..., a+size]. Added more nullaray unit tests.

---
 test/nullary.cpp | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

(limited to 'test/nullary.cpp')

diff --git a/test/nullary.cpp b/test/nullary.cpp
index a7f6c60a7..240365529 100644
--- a/test/nullary.cpp
+++ b/test/nullary.cpp
@@ -46,6 +46,54 @@ bool equalsIdentity(const MatrixType& A)
   return offDiagOK && diagOK;
 }
 
+template<typename VectorType>
+void testVectorType(const VectorType& base)
+{
+  typedef typename ei_traits<VectorType>::Scalar Scalar;
+  Scalar low = ei_random(-500,500);
+  Scalar high = ei_random(-500,500);  
+  if (low>high) std::swap(low,high);  
+  const int size = base.size();
+  const Scalar step = (high-low)/(size-1);
+
+  // check whether the result yields what we expect it to do
+  VectorType m(base);
+  m.setLinSpaced(low,high,size);
+
+  VectorType n(size);
+  for (int i=0; i<size; ++i)
+    n(i) = low+i*step;
+
+  VERIFY( (m-n).norm() < std::numeric_limits<Scalar>::epsilon()*10e3 );
+
+  // random access version
+  m = VectorType::LinSpaced(low,high,size);
+  VERIFY( (m-n).norm() < std::numeric_limits<Scalar>::epsilon()*10e3 );
+
+  // These guys sometimes fail! This is not good. Any ideas how to fix them!?
+  //VERIFY( m(m.size()-1) == high );
+  //VERIFY( m(0) == low );
+
+  // sequential access version
+  m = VectorType::LinSpaced(Sequential,low,high,size);
+  VERIFY( (m-n).norm() < std::numeric_limits<Scalar>::epsilon()*10e3 );
+
+  // These guys sometimes fail! This is not good. Any ideas how to fix them!?
+  //VERIFY( m(m.size()-1) == high );
+  //VERIFY( m(0) == low );
+
+  // check whether everything works with row and col major vectors
+  Matrix<Scalar,Dynamic,1> row_vector(size);
+  Matrix<Scalar,1,Dynamic> col_vector(size);
+  row_vector.setLinSpaced(low,high,size);
+  col_vector.setLinSpaced(low,high,size);
+  VERIFY( (row_vector-col_vector.transpose()).norm() < 1e-10 );
+
+  Matrix<Scalar,Dynamic,1> size_changer(size+50);
+  size_changer.setLinSpaced(low,high,size);
+  VERIFY( size_changer.size() == size );  
+}
+
 template<typename MatrixType>
 void testMatrixType(const MatrixType& m)
 {
@@ -63,4 +111,10 @@ void test_nullary()
   CALL_SUBTEST_1( testMatrixType(Matrix2d()) );
   CALL_SUBTEST_2( testMatrixType(MatrixXcf(50,50)) );
   CALL_SUBTEST_3( testMatrixType(MatrixXf(5,7)) );
+  CALL_SUBTEST_4( testVectorType(VectorXd(51)) );
+  CALL_SUBTEST_5( testVectorType(VectorXd(41)) );
+  CALL_SUBTEST_6( testVectorType(Vector3d()) );
+  CALL_SUBTEST_7( testVectorType(VectorXf(51)) );
+  CALL_SUBTEST_8( testVectorType(VectorXf(41)) );
+  CALL_SUBTEST_9( testVectorType(Vector3f()) );
 }
-- 
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