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/*=========================================================================
Program: Visualization Toolkit
Module: TestHighestDensityRegionsStatistics.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkDoubleArray.h"
#include "vtkIntArray.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkNew.h"
#include "vtkSmartPointer.h"
#include "vtkTable.h"
#include "vtkHighestDensityRegionsStatistics.h"
#include <sstream>
//----------------------------------------------------------------------------
int TestHighestDensityRegionsStatistics(int , char * [])
{
vtkNew<vtkTable> table;
vtkNew<vtkDoubleArray> arrFirstVariable;
const char *namev1 = "Math";
arrFirstVariable->SetName(namev1);
table->AddColumn(arrFirstVariable.GetPointer());
vtkNew<vtkDoubleArray> arrSecondVariable;
const char *namev2 = "French";
arrSecondVariable->SetName(namev2);
table->AddColumn(arrSecondVariable.GetPointer());
vtkNew<vtkDoubleArray> arrThirdVariable;
const char *namev3 = "MG";
arrThirdVariable->SetName(namev3);
table->AddColumn(arrThirdVariable.GetPointer());
int numPoints = 20;
table->SetNumberOfRows(numPoints);
double MathValue[] =
{
18, 20, 20, 16,
12, 14, 16, 14,
14, 13, 16, 18,
6, 10, 16, 14,
4, 16, 16, 14
};
double FrenchValue[] =
{
14, 12, 14, 16,
12, 14, 16, 4,
4, 10, 6, 20,
14, 16, 14, 14,
12, 2, 14, 8
};
for (int i = 0; i < numPoints; ++i)
{
table->SetValue(i, 0, i); // Known Test Values
table->SetValue(i, 1, MathValue[i]);
table->SetValue(i, 2, FrenchValue[i]);
table->SetValue(i, 3, (MathValue[i] + FrenchValue[i]) / 2.0);
table->SetValue(i, 4, MathValue[i] - FrenchValue[i]);
}
// Run HDR
// Set HDR statistics algorithm and its input data port
vtkNew<vtkHighestDensityRegionsStatistics> hdrs;
// First verify that absence of input does not cause trouble
cout << "## Verifying that absence of input does not cause trouble... ";
hdrs->Update();
cout << "done.\n";
hdrs->SetInputData(vtkStatisticsAlgorithm::INPUT_DATA, table.GetPointer());
// Select Column Pairs of Interest ( Learn Mode )
// 1: a valid pair
hdrs->AddColumnPair(namev1, namev2);
// 2: another valid pair
hdrs->AddColumnPair(namev2, namev3);
// 3: an invalid pair
hdrs->AddColumnPair(namev2, "M3");
hdrs->SetLearnOption(true);
hdrs->SetDeriveOption(true);
hdrs->SetAssessOption(false);
hdrs->SetTestOption(false);
hdrs->Update();
cout << "\n## Result:\n";
vtkMultiBlockDataSet* outputMetaDS = vtkMultiBlockDataSet::SafeDownCast(
hdrs->GetOutputDataObject(vtkStatisticsAlgorithm::OUTPUT_MODEL ) );
vtkTable* outputMetaLearn = vtkTable::SafeDownCast(outputMetaDS->GetBlock(0));
outputMetaLearn->Dump();
std::stringstream ss;
ss << "HDR (" << namev1 << "," << namev2 << ")";
vtkDoubleArray* HDRArray = vtkArrayDownCast<vtkDoubleArray>(
outputMetaLearn->GetColumnByName(ss.str().c_str()));
if (!HDRArray)
{
cout << "Fail! The HDR column is missing from the result table!" << endl;
return EXIT_FAILURE;
}
cout << "## Done." << endl;
return EXIT_SUCCESS;
}
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