/usr/include/ITK-4.9/itkTanSigmoidTransferFunction.hxx is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | /*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkTanSigmoidTransferFunction_hxx
#define itkTanSigmoidTransferFunction_hxx
#include "itkTanSigmoidTransferFunction.h"
namespace itk
{
namespace Statistics
{
/** Constructor */
template<typename ScalarType>
TanSigmoidTransferFunction<ScalarType>
::TanSigmoidTransferFunction()
{
}
/** Destructor */
template<typename ScalarType>
TanSigmoidTransferFunction<ScalarType>
::~TanSigmoidTransferFunction()
{
}
/** Evaluate */
template<typename ScalarType>
ScalarType
TanSigmoidTransferFunction<ScalarType>
::Evaluate(const ScalarType& input) const
{
return static_cast<ScalarType>((2
/ (1 + std::exp(-2 * static_cast<ScalarType>(input))))
- 1);
}
/** Evaluate derivatives */
template<typename ScalarType>
ScalarType
TanSigmoidTransferFunction<ScalarType>
::EvaluateDerivative(const ScalarType& input) const
{
ScalarType f = Evaluate(input);
return 1 - (f * f);
}
/** Print the object */
template<typename ScalarType>
void
TanSigmoidTransferFunction<ScalarType>
::PrintSelf( std::ostream& os, Indent indent ) const
{
os << indent << "TanSigmoidTransferFunction(" << this << ")" << std::endl;
Superclass::PrintSelf( os, indent );
}
} // end namespace Statistics
} // end namespace itk
#endif
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