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ArrayBase::sign: add unit test and fix doc

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This commit is contained in:
Gael Guennebaud 2015-11-27 16:27:53 +01:00
parent da46b1ed54
commit 3f32f5ec22
2 changed files with 9 additions and 2 deletions
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3
Eigen/src/plugins/ArrayCwiseUnaryOps.h
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@ -141,8 +141,7 @@ sqrt() const
/** \returns an expression of the coefficient-wise signum of *this.
*
* This function computes the coefficient-wise signum. The function MatrixBase::sign() in the
* unsupported module MatrixFunctions computes the matrix square root.
* This function computes the coefficient-wise signum.
*
* Example: \include Cwise_sign.cpp
* Output: \verbinclude Cwise_sign.out

8
test/array.cpp
View File

@ -230,6 +230,7 @@ template<typename ArrayType> void array_real(const ArrayType& m)
VERIFY_IS_APPROX(m1.square(), square(m1));
VERIFY_IS_APPROX(m1.cube(), cube(m1));
VERIFY_IS_APPROX(cos(m1+RealScalar(3)*m2), cos((m1+RealScalar(3)*m2).eval()));
VERIFY_IS_APPROX(m1.sign(), sign(m1));
// avoid NaNs with abs() so verification doesn't fail
@ -255,6 +256,9 @@ template<typename ArrayType> void array_real(const ArrayType& m)
VERIFY_IS_APPROX(inverse(inverse(m1)),m1);
VERIFY((abs(m1) == m1 || abs(m1) == -m1).all());
VERIFY_IS_APPROX(m3, sqrt(abs2(m1)));
VERIFY_IS_APPROX( m1.sign(), -(-m1).sign() );
VERIFY_IS_APPROX( m1*m1.sign(),m1.abs());
VERIFY_IS_APPROX(m1.sign() * m1.abs(), m1);
VERIFY_IS_APPROX(numext::abs2(numext::real(m1)) + numext::abs2(numext::imag(m1)), numext::abs2(m1));
VERIFY_IS_APPROX(numext::abs2(real(m1)) + numext::abs2(imag(m1)), numext::abs2(m1));
@ -348,6 +352,7 @@ template<typename ArrayType> void array_complex(const ArrayType& m)
VERIFY_IS_APPROX(m1.square(), square(m1));
VERIFY_IS_APPROX(m1.cube(), cube(m1));
VERIFY_IS_APPROX(cos(m1+RealScalar(3)*m2), cos((m1+RealScalar(3)*m2).eval()));
VERIFY_IS_APPROX(m1.sign(), sign(m1));
VERIFY_IS_APPROX(m1.exp() * m2.exp(), exp(m1+m2));
@ -391,6 +396,9 @@ template<typename ArrayType> void array_complex(const ArrayType& m)
VERIFY_IS_APPROX(abs(m1), sqrt(abs2(m1)));
VERIFY_IS_APPROX(log10(m1), log(m1)/log(10));
VERIFY_IS_APPROX( m1.sign(), -(-m1).sign() );
VERIFY_IS_APPROX( m1.sign() * m1.abs(), m1);
// scalar by array division
const RealScalar tiny = sqrt(std::numeric_limits<RealScalar>::epsilon());
s1 += Scalar(tiny);