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include
shark
Unsupervised
RBM
Problems
BarsAndStripes.h
Go to the documentation of this file.
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/*!
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* \brief Implements the Bars & Stripes benchmark problem.
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*
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* \author O. Krause, A.Fischer, K.Bruegge
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* \date 2012
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*
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*
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* \par Copyright 1995-2017 Shark Development Team
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*
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* <BR><HR>
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* This file is part of Shark.
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* <http://shark-ml.org/>
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*
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* Shark is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Shark is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Shark. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef UNSUPERVISED_RBM_PROBLEMS_BARSANDSTRIPES_H
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#define UNSUPERVISED_RBM_PROBLEMS_BARSANDSTRIPES_H
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#include <
shark/Data/Dataset.h
>
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#include <
shark/LinAlg/Base.h
>
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namespace
shark
{
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///Generates the Bars-And-Stripes problem. In this problem, a 4x4 image has either rows or columns of the same value.
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class
BarsAndStripes
{
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private
:
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UnlabeledData<RealVector>
m_data;
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public
:
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BarsAndStripes
(std::size_t
batchSize
= 32,
bool
bipolar =
false
){
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std::vector<RealVector>
data
(32,RealVector(16));
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RealVector line(4);
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for
(
size_t
x=0; x != 16; x++) {
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for
(
size_t
j=0; j != 4; j++) {
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line(j) = (x & (std::size_t(1)<<j)) > 0;
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if
(bipolar && line(j)==0) line(j) = -1;
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}
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for
(
int
i=0; i != 4; i++) {
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subrange(data[x],i*4 ,i*4 + 4) = line;
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}
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for
(
int
i=0; i != 4; i++) {
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for
(
int
l=0; l<4; l++) {
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data[16+x](l*4 + i) = line(l);
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}
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}
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}
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m_data =
createDataFromRange
(data,
batchSize
);
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}
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///Returns all input pattern of the BarsAndStripes problem
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UnlabeledData<RealVector>
data
()
const
{
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return
m_data;
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};
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///returns the dimensionality of the data
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std::size_t
inputDimension
()
const
{
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return
16;
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}
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};
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}
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#endif