Analytics: Regression plugin

- An OpenCV-based regression plugin using Random Forest models
- Also added a few missing copy constructors

analytics/Makefile

 include ../config.mk
 #include ../common.mk
 
-CXXFLAGS += -DBOOST_NETWORK_ENABLE_HTTPS -I../common/include -I$(DCDBDEPLOYPATH)/include
+CXXFLAGS += -DBOOST_NETWORK_ENABLE_HTTPS -I../common/include -I$(DCDBDEPLOYPATH)/include -I$(DCDBDEPLOYPATH)/include/opencv4
 LIBS = -L../lib -L$(DCDBDEPLOYPATH)/lib/ -ldl -lboost_system -lboost_thread -lboost_log_setup -lboost_log -lboost_regex -lpthread -rdynamic
 
-ANALYZERS = aggregator job_aggregator
+ANALYZERS = aggregator regressor job_aggregator
 
 ifeq ($(OS),Darwin)
 	BACNET_PORT = bsd
@@ -46,5 +46,8 @@ analyzers/%.o: CXXFLAGS+= $(PLUGINFLAGS)
 libdcdbanalyzer_aggregator.$(LIBEXT): analyzers/aggregator/AggregatorAnalyzer.o analyzers/aggregator/AggregatorConfigurator.o ../common/src/sensornavigator.o
 	$(CXX) $(LIBFLAGS)$@ -o $@ $^ -L$(DCDBDEPLOYPATH)/lib/ -lboost_log -lboost_system -lboost_regex
 	
+libdcdbanalyzer_regressor.$(LIBEXT): analyzers/regressor/RegressorAnalyzer.o analyzers/regressor/RegressorConfigurator.o ../common/src/sensornavigator.o
+	$(CXX) $(LIBFLAGS)$@ -o $@ $^ -L$(DCDBDEPLOYPATH)/lib/ -lboost_log -lboost_system -lboost_regex -lopencv_core -lopencv_ml
+	
 libdcdbanalyzer_job_aggregator.$(LIBEXT): analyzers/aggregator/AggregatorAnalyzer.o analyzers/aggregator/JobAggregatorAnalyzer.o analyzers/aggregator/JobAggregatorConfigurator.o ../common/src/sensornavigator.o
 	$(CXX) $(LIBFLAGS)$@ -o $@ $^ -L$(DCDBDEPLOYPATH)/lib/ -lboost_log -lboost_system -lboost_regex

analytics/analyzers/aggregator/AggregatorAnalyzer.cpp

@@ -30,6 +30,10 @@ AggregatorAnalyzer::AggregatorAnalyzer(const std::string& name) : AnalyzerTempla
     _window = 0;
 }
 
+AggregatorAnalyzer::AggregatorAnalyzer(const AggregatorAnalyzer& other) : AnalyzerTemplate(other) {
+    _window = other._window;
+}
+
 AggregatorAnalyzer::~AggregatorAnalyzer() {
     if(_buffer)
         delete _buffer;

analytics/analyzers/aggregator/AggregatorAnalyzer.h

@@ -42,6 +42,8 @@ class AggregatorAnalyzer : virtual public AnalyzerTemplate<AggregatorSensorBase>
 public:
     
     AggregatorAnalyzer(const std::string& name);
+    AggregatorAnalyzer(const AggregatorAnalyzer& other);
+    
     virtual ~AggregatorAnalyzer();
 
     void setWindow(unsigned long long w)        { _window = w; }

analytics/analyzers/aggregator/JobAggregatorAnalyzer.cpp

@@ -26,11 +26,13 @@
 
 #include "JobAggregatorAnalyzer.h"
 
-JobAggregatorAnalyzer::JobAggregatorAnalyzer(const std::string& name) : 
+JobAggregatorAnalyzer::JobAggregatorAnalyzer(const std::string& name) :
     AnalyzerTemplate(name),
     AggregatorAnalyzer(name),
     JobAnalyzerTemplate(name) {}
 
+JobAggregatorAnalyzer::JobAggregatorAnalyzer(const JobAggregatorAnalyzer& other) : AnalyzerTemplate(other._name), AggregatorAnalyzer(other), JobAnalyzerTemplate(other._name) {}
+
 JobAggregatorAnalyzer::~JobAggregatorAnalyzer() {}
 
 void JobAggregatorAnalyzer::compute(U_Ptr unit, qeJobData& jobData) {

analytics/analyzers/aggregator/JobAggregatorAnalyzer.h

@@ -39,6 +39,8 @@ class JobAggregatorAnalyzer : public AggregatorAnalyzer, public JobAnalyzerTempl
 public:
 
     JobAggregatorAnalyzer(const std::string& name);
+    JobAggregatorAnalyzer(const JobAggregatorAnalyzer& other);
+    
     virtual ~JobAggregatorAnalyzer();
 
 protected:

analytics/analyzers/regressor/RegressorAnalyzer.cpp

+//================================================================================
+// Name        : RegressorAnalyzer.cpp
+// Author      : Alessio Netti
+// Copyright   : Leibniz Supercomputing Centre
+// Description :
+//================================================================================
+
+//================================================================================
+// This file is part of DCDB (DataCenter DataBase)
+// Copyright (C) 2019-2019 Leibniz Supercomputing Centre
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//================================================================================
+
+#include "RegressorAnalyzer.h"
+
+RegressorAnalyzer::RegressorAnalyzer(const std::string& name) : AnalyzerTemplate(name) {
+    _modelIn = "";
+    _modelOut = "";
+    _aggregationWindow = 0;
+    _targetDistance = 1;
+    _trainingSamples = 256;
+    _trainingPending = true;
+    _trainingSet = nullptr;
+    _responseSet = nullptr;
+    _currentfVector = nullptr;
+    _buffer = nullptr;
+}
+
+RegressorAnalyzer::RegressorAnalyzer(const RegressorAnalyzer& other) : AnalyzerTemplate(other) {
+    _modelIn = other._modelIn;
+    //_modelOut = other._modelOut;
+    _aggregationWindow = other._aggregationWindow;
+    _targetDistance = other._targetDistance;
+    _trainingSamples = other._trainingSamples;
+}
+
+RegressorAnalyzer::~RegressorAnalyzer() {
+    if(_trainingSet)
+        delete _trainingSet;
+    if(_responseSet)
+        delete _responseSet;
+    if(_currentfVector)
+        delete _currentfVector;
+    if(_buffer)
+        delete _buffer;
+    _rForest.release();
+    _buffer = nullptr;
+    _currentfVector = nullptr;
+    _trainingSet = nullptr;
+    _responseSet = nullptr;
+}
+
+restResponse_t RegressorAnalyzer::REST(const string& action, const unordered_map<string, string>& queries) {
+    restResponse_t resp;
+    if(action=="train") {
+        resp.response = "Re-training triggered for regressor " + this->_name + "!";
+        this->_trainingPending = true;
+    } else
+        throw invalid_argument("Unknown plugin action " + action + " requested!");
+    return resp;
+}
+
+void RegressorAnalyzer::init(boost::asio::io_service& io) {
+    bool useDefault=true;
+    if(_modelIn!="") {
+        try {
+            _rForest = cv::ml::RTrees::load(_modelIn);
+            if(!_rForest->isTrained() || _units.empty() || _units[0]->getInputs().size()*REG_NUMFEATURES!=_rForest->getVarCount()) 
+                LOG(error) << "Analyzer " + _name + ": incompatible model, falling back to default!";
+            else {
+                _trainingPending = false;
+                useDefault = false;
+            }
+        } catch(const std::exception& e) {
+            LOG(error) << "Analyzer " + _name + ": cannot load model from file, falling back to default!"; }
+    }
+    if(useDefault)
+        _rForest = cv::ml::RTrees::create();
+    AnalyzerTemplate<RegressorSensorBase>::init(io);
+}
+
+void RegressorAnalyzer::printConfig(LOG_LEVEL ll) {
+    LOG_VAR(ll) << "            Window:          " << _aggregationWindow;
+    LOG_VAR(ll) << "            Target Distance: " << _targetDistance;
+    LOG_VAR(ll) << "            Training Sample: " << _trainingSamples;
+    LOG_VAR(ll) << "            Input Path:      " << (_modelIn!="" ? _modelIn : std::string("none"));
+    LOG_VAR(ll) << "            Output Path:     " << (_modelOut!="" ? _modelOut : std::string("none"));
+    AnalyzerTemplate<RegressorSensorBase>::printConfig(ll);
+}
+
+void RegressorAnalyzer::compute(U_Ptr unit) {
+    computeFeatureVector(unit);
+    if (_trainingPending && _streaming) {
+        if (!_trainingSet)
+            _trainingSet = new cv::Mat();
+        if (!_responseSet)
+            _responseSet = new cv::Mat();
+        _trainingSet->push_back(*_currentfVector);
+        _responseSet->push_back(_currentTarget);
+        if (_trainingSet->size().height >= _trainingSamples + _targetDistance)
+            trainRandomForest();
+    }
+    if(_rForest.empty() || !(_rForest->isTrained() || (_trainingPending && _streaming))) 
+        throw std::runtime_error("Analyzer " + _name + ": cannot perform prediction, the model is untrained!");
+    if(_rForest->isTrained()) {
+        reading_t predict;
+        predict.value = (int64_t) _rForest->predict(*_currentfVector);
+        //LOG(error) << "FVector" << *_currentfVector;
+        //LOG(error) << "Prediction: " << _rForest->predict(*_currentfVector);
+        predict.timestamp = getTimestamp();
+        unit->getOutputs()[0]->storeReading(predict);
+    }
+}
+
+void RegressorAnalyzer::trainRandomForest() {
+    if(!_trainingSet || _rForest.empty())
+        throw std::runtime_error("Analyzer " + _name + ": cannot perform training, missing model!");
+    if(_responseSet->size().height <= _targetDistance)
+        throw std::runtime_error("Analyzer " + _name + ": cannot perform training, insufficient data!");
+    // Shifting the training and response sets so as to obtain the desired prediction distance
+    *_responseSet = _responseSet->rowRange(_targetDistance, _responseSet->size().height-1);
+    *_trainingSet = _trainingSet->rowRange(0, _trainingSet->size().height-1-_targetDistance);
+    //LOG(error) << "Training set:";
+    //LOG(error) << *_trainingSet;
+    //LOG(error) << "Response set:";
+    //LOG(error) << *_responseSet;
+    if(!_rForest->train(*_trainingSet, cv::ml::ROW_SAMPLE, *_responseSet))
+        throw std::runtime_error("Analyzer " + _name + ": model training failed!");
+    delete _trainingSet;
+    _trainingSet = nullptr;
+    delete _responseSet;
+    _responseSet = nullptr;
+    _trainingPending = false;
+    LOG(info) << "Analyzer " + _name + ": model training performed.";
+    if(_modelOut!="") {
+        try {
+            _rForest->save(_modelOut);
+        } catch(const std::exception& e) {
+            LOG(error) << "Analyzer " + _name + ": cannot save model to file!"; }
+    }
+}
+
+void RegressorAnalyzer::computeFeatureVector(U_Ptr unit) {
+    if(!_currentfVector)
+        _currentfVector = new cv::Mat(1, unit->getInputs().size()*REG_NUMFEATURES, CV_32F);
+    int64_t val;
+    size_t qId, qMod, idx, fIdx;
+    std::vector<RegressorSBPtr>& inputs = unit->getInputs();
+    for(idx=0; idx<inputs.size(); idx++) {
+        _mean=0; _std=0; _diffsum=0; _qtl25=0; _qtl75=0;
+        if(_buffer)
+            _buffer->clear();
+        _buffer = _queryEngine.querySensor(inputs[idx]->getName(), _aggregationWindow, 0, _buffer);
+        if(!_buffer || _buffer->empty())
+            throw std::runtime_error("Analyzer " + _name + ": cannot read from sensor " + inputs[idx]->getName() + "!");
+        if (inputs[idx]->getTrainingTarget())
+            _currentTarget = (float)_buffer->back().value;
+
+        // Computing MEAN and SUM OF DIFFERENCES
+        val = _buffer->front().value;
+        for(const auto& v : *_buffer) {
+            _mean    += v.value;
+            _diffsum += v.value - val;
+            val = v.value;
+        }
+        _mean /= _buffer->size();
+        
+        // Computing STD
+        for(const auto& v : *_buffer) {
+            val = v.value - _mean;
+            _std += val*val;
+        }
+        _std = sqrt(_std/_buffer->size());
+        
+        // I know, sorting is costly; here, we assume that the aggregation window of sensor data is going to be relatively
+        // small, in which case the O(log(N)) complexity of the std::sort implementation converges to O(N)
+        std::sort(_buffer->begin(), _buffer->end(), [ ](const reading_t& lhs, const reading_t& rhs) { return lhs.value < rhs.value; });
+        // Computing 25th PERCENTILE
+        qId  = (_buffer->size() * 25) / 100;
+        qMod = (_buffer->size() * 25) % 100;
+        _qtl25 = (qMod==0 || qId==_buffer->size()-1) ? _buffer->at(qId).value : (_buffer->at(qId).value + _buffer->at(qId+1).value)/2;
+        // Computing 75th PERCENTILE
+        qId  = (_buffer->size() * 75) / 100;
+        qMod = (_buffer->size() * 75) % 100;
+        _qtl75 = (qMod==0 || qId==_buffer->size()-1) ? _buffer->at(qId).value : (_buffer->at(qId).value + _buffer->at(qId+1).value)/2;
+        
+        fIdx = idx * REG_NUMFEATURES;
+        // Casting and storing the statistical features
+        _currentfVector->at<float>(fIdx)   = (float)_mean;
+        _currentfVector->at<float>(fIdx+1) = (float)_std;
+        _currentfVector->at<float>(fIdx+2) = (float)_diffsum;
+        _currentfVector->at<float>(fIdx+3) = (float)_qtl25;
+        _currentfVector->at<float>(fIdx+4) = (float)_qtl75;
+    }
+    //LOG(error) << "Target: " << _currentTarget;
+    //LOG(error) << "Vector: ";
+    //for(idx=0; idx<_currentfVector->size().width;idx++)
+    //    LOG(error) << _currentfVector->at<float>(idx);
+}

analytics/analyzers/regressor/RegressorAnalyzer.h

+//================================================================================
+// Name        : RegressorAnalyzer.h
+// Author      : Alessio Netti
+// Copyright   : Leibniz Supercomputing Centre
+// Description :
+//================================================================================
+
+//================================================================================
+// This file is part of DCDB (DataCenter DataBase)
+// Copyright (C) 2019-2019 Leibniz Supercomputing Centre
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//================================================================================
+
+#ifndef PROJECT_REGRESSORANALYZER_H
+#define PROJECT_REGRESSORANALYZER_H
+
+
+#include "../../includes/AnalyzerTemplate.h"
+#include "RegressorSensorBase.h"
+#include "opencv4/opencv2/core/mat.hpp"
+#include "opencv4/opencv2/core/cvstd.hpp"
+#include "opencv4/opencv2/ml.hpp"
+#include <math.h>
+
+#define REG_NUMFEATURES 5
+
+/**
+ * @brief Regressor analyzer plugin.
+ *
+ * @ingroup regressor
+ */
+class RegressorAnalyzer : virtual public AnalyzerTemplate<RegressorSensorBase> {
+
+public:
+    
+    RegressorAnalyzer(const std::string& name);
+    RegressorAnalyzer(const RegressorAnalyzer& other);
+    
+    virtual ~RegressorAnalyzer();
+
+    virtual restResponse_t REST(const string& action, const unordered_map<string, string>& queries) override;
+
+    virtual void init(boost::asio::io_service& io) override;
+
+    void setInputPath(std::string in)                    { _modelIn = in; }
+    void setOutputPath(std::string out)                  { _modelOut = out; }
+    void setAggregationWindow(unsigned long long a)      { _aggregationWindow = a; }
+    void setTrainingSamples(unsigned long long t)        { _trainingSamples = t; }
+    void setTargetDistance(unsigned long long d)         { _targetDistance = d;  }
+    void triggerTraining()                               { _trainingPending = true;}
+
+    std::string getInputPath()                           { return _modelIn;}
+    std::string getOutputPath()                          { return _modelOut; }
+    unsigned long long getAggregationWindow()            { return _aggregationWindow; }
+    unsigned long long getTrainingSamples()              { return _trainingSamples; }
+
+    void printConfig(LOG_LEVEL ll) override;
+
+protected:
+
+    virtual void compute(U_Ptr unit)	 override;
+    void computeFeatureVector(U_Ptr unit);
+    void trainRandomForest();
+    
+    std::string _modelOut;
+    std::string _modelIn;
+    unsigned long long _aggregationWindow;
+    unsigned long long _trainingSamples;
+    unsigned long long _targetDistance;
+    bool _trainingPending;
+
+    vector<reading_t> *_buffer;
+    cv::Ptr<cv::ml::RTrees> _rForest;
+    cv::Mat *_trainingSet;
+    cv::Mat *_responseSet;
+    cv::Mat *_currentfVector;
+    float _currentTarget;
+
+    // Misc buffers
+    int64_t _mean;
+    int64_t _std;
+    int64_t _diffsum;
+    int64_t _qtl25;
+    int64_t _qtl75;
+    
+
+};
+
+
+#endif //PROJECT_REGRESSORANALYZER_H

analytics/analyzers/regressor/RegressorConfigurator.cpp

+//================================================================================
+// Name        : RegressorConfigurator.cpp
+// Author      : Alessio Netti
+// Copyright   : Leibniz Supercomputing Centre
+// Description :
+//================================================================================
+
+//================================================================================
+// This file is part of DCDB (DataCenter DataBase)
+// Copyright (C) 2019-2019 Leibniz Supercomputing Centre
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//================================================================================
+
+#include "RegressorConfigurator.h"
+
+RegressorConfigurator::RegressorConfigurator() : AnalyzerConfiguratorTemplate() {
+    _analyzerName = "regressor";
+    _baseName     = "sensor";
+}
+
+RegressorConfigurator::~RegressorConfigurator() {}
+
+void RegressorConfigurator::sensorBase(RegressorSensorBase& s, CFG_VAL config) {
+    BOOST_FOREACH(boost::property_tree::iptree::value_type &val, config)
+    {
+        if (boost::iequals(val.first, "target")) {
+            s.setTrainingTarget(to_bool(val.second.data()));
+            std::string opName = val.second.data();
+        }
+    }
+}
+
+void RegressorConfigurator::analyzer(RegressorAnalyzer& a, CFG_VAL config) {
+    BOOST_FOREACH(boost::property_tree::iptree::value_type &val, config)
+    {
+        if (boost::iequals(val.first, "trainingSamples"))
+            a.setTrainingSamples(stoull(val.second.data()));
+        else if(boost::iequals(val.first, "window"))
+            a.setAggregationWindow(stoull(val.second.data()) * 1000000);
+        else if(boost::iequals(val.first, "targetDistance"))
+            a.setTargetDistance(stoull(val.second.data()));
+        else if(boost::iequals(val.first, "inputPath"))
+            a.setInputPath(val.second.data());
+        else if(boost::iequals(val.first, "outputPath"))
+            a.setOutputPath(val.second.data());
+    }
+}
+
+bool RegressorConfigurator::unit(UnitTemplate<RegressorSensorBase>& u) { 
+    bool targetSet=false;
+    for(const auto& in : u.getInputs())
+        if(in->getTrainingTarget()) {
+            if(!targetSet)
+                targetSet = true;
+            else {
+                LOG(error) << _analyzerName << ": Only one regression target can be specified!";
+                return false;
+            }
+        }
+    if(!targetSet) {
+        LOG(error) << _analyzerName << ": No regression target was specified!";
+        return false;
+    }
+    if(u.getOutputs().size()!=1) {
+        LOG(error) << _analyzerName << ": Only one output sensor per unit is allowed!";
+        return false;
+    }
+    return true; 
+}

analytics/analyzers/regressor/RegressorConfigurator.h

+//================================================================================
+// Name        : RegressorConfigurator.h
+// Author      : Alessio Netti
+// Copyright   : Leibniz Supercomputing Centre
+// Description :
+//================================================================================
+
+//================================================================================
+// This file is part of DCDB (DataCenter DataBase)
+// Copyright (C) 2019-2019 Leibniz Supercomputing Centre
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//================================================================================
+
+#ifndef PROJECT_REGRESSORCONFIGURATOR_H
+#define PROJECT_REGRESSORCONFIGURATOR_H
+
+#include "../../includes/AnalyzerConfiguratorTemplate.h"
+#include "RegressorAnalyzer.h"
+
+/**
+ * @brief Configurator for the regressor plugin.
+ *
+ * @ingroup regressor
+ */
+class RegressorConfigurator : virtual public AnalyzerConfiguratorTemplate<RegressorAnalyzer, RegressorSensorBase> {
+
+public:
+    RegressorConfigurator();
+    ~RegressorConfigurator();
+
+private:
+    void sensorBase(RegressorSensorBase& s, CFG_VAL config) override;
+    void analyzer(RegressorAnalyzer& a, CFG_VAL config) override;
+    bool unit(UnitTemplate<RegressorSensorBase>& u) override;
+
+};
+
+extern "C" AnalyzerConfiguratorInterface* create() {
+    return new RegressorConfigurator;
+}
+
+extern "C" void destroy(AnalyzerConfiguratorInterface* c) {
+    delete c;
+}
+
+
+#endif //PROJECT_REGRESSORCONFIGURATOR_H

analytics/analyzers/regressor/RegressorSensorBase.h

+//================================================================================
+// Name        : RegressorSensorBase.h
+// Author      : Alessio Netti
+// Copyright   : Leibniz Supercomputing Centre
+// Description :
+//================================================================================
+
+//================================================================================
+// This file is part of DCDB (DataCenter DataBase)
+// Copyright (C) 2019-2019 Leibniz Supercomputing Centre
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//================================================================================
+
+/**
+ * @defgroup regressor Regressor analyzer plugin.
+ * @ingroup analyzer
+ *
+ * @brief Regressor analyzer plugin.
+ */
+
+#ifndef PROJECT_REGRESSORSENSORBASE_H
+#define PROJECT_REGRESSORSENSORBASE_H
+
+#include "sensorbase.h"
+
+/**
+ * @brief Sensor base for regressor plugin
+ *
+ * @ingroup regressor
+ */
+class RegressorSensorBase : public SensorBase {
+
+public:
+    
+    // Constructor and destructor
+    RegressorSensorBase(const std::string& name) : SensorBase(name) {
+        _trainingTarget = false;
+    }
+
+    // Copy constructor
+    RegressorSensorBase(RegressorSensorBase& other) : SensorBase(other) {
+        _trainingTarget = other._trainingTarget;
+    }
+
+    virtual ~RegressorSensorBase() {}
+