this time with all the junk...

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/gudhi_stat@1353 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 597257aa46f9dc4b1f8b856cb06610461b16c470

1 files changed, 169 insertions, 0 deletions

diff --git a/src/Gudhi_stat/example/persistence_landscape.cpp b/src/Gudhi_stat/example/persistence_landscape.cpp
new file mode 100644
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+++ b/src/Gudhi_stat/example/persistence_landscape.cpp
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+/*    This file is part of the Gudhi Library. The Gudhi library
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++
+ *    library for computational topology.
+ *
+ *    Author(s):       Pawel Dlotko
+ *
+ *    Copyright (C) 2015  INRIA Sophia-Saclay (France)
+ *
+ *    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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+
+
+#include <gudhi/abstract_classes/Abs_Topological_data.h>
+#include <gudhi/concretizations/Persistence_landscapes.h>
+
+
+
+using namespace Gudhi;
+using namespace Gudhi::Gudhi_stat;
+
+#include <iostream>
+
+
+int main( int argc , char** argv )
+{
+	
+	if ( argc != 2 )
+	{
+		std::cerr << "To run this program, please provide a name of a file with persistence landscape \n";
+		//return 1;
+	}
+	//char* filename = argv[1];
+	char* filename = (char*)"../test/data/file_with_diagram";
+	Persistence_landscape p(filename);
+	
+	Persistence_landscape q;
+	q.load_landscape_from_file( "file_with_landscape_from_file_with_diagram" );
+	
+	if ( p != q )
+	{
+		cout << "Not equal \n";
+	}
+	
+	double integral = p.compute_integral_of_landscape();
+	cout << "integral : " << integral <<endl;
+	
+	//compute integral for each level separatelly
+	for ( size_t level = 0 ; level != p.size() ; ++level )
+	{
+		cout << p.compute_integral_of_landscape( level ) << endl;
+	}
+	
+	//compute integral of p-th power of landscspe
+	for ( size_t power = 0 ; power != 5 ; ++power ) 
+	{
+		cout << p.compute_integral_of_landscape( power ) << endl;
+	}
+	
+	cout << "Value of level 1 at 0 : " <<  p.compute_value_at_a_given_point(1,0.0) << endl;
+	cout << "Value of level 1  at 1 : " <<  p.compute_value_at_a_given_point(1,0.1) << endl;
+	cout << "Value of level 1  at 2 : " <<  p.compute_value_at_a_given_point(1,0.2) << endl;
+	cout << "Value of level 1  at 3 : " <<  p.compute_value_at_a_given_point(1,0.3) << endl;
+	
+		
+	cout << "Value of level 2 at 0 : " <<  p.compute_value_at_a_given_point(2,0.0) << endl;
+	cout << "Value of level 2  at 1 : " <<  p.compute_value_at_a_given_point(2,0.1) << endl;
+	cout << "Value of level 2  at 2 : " <<  p.compute_value_at_a_given_point(2,0.2) << endl;
+	cout << "Value of level 2  at 3 : " <<  p.compute_value_at_a_given_point(2,0.3) << endl;
+	
+		
+	cout << "Value of level 3 at 0 : " <<  p.compute_value_at_a_given_point(3,0.0) << endl;
+	cout << "Value of level 3  at 1 : " <<  p.compute_value_at_a_given_point(3,0.1) << endl;
+	cout << "Value of level 3  at 2 : " <<  p.compute_value_at_a_given_point(3,0.2) << endl;
+	cout << "Value of level 3  at 3 : " <<  p.compute_value_at_a_given_point(3,0.3) << endl;
+	
+	
+	
+	Persistence_landscape second;
+	second.load_landscape_from_file("file_with_landscape_from_file_with_diagram_1" );
+	
+	Persistence_landscape sum = p + second;
+	Persistence_landscape difference = p - second;
+	Persistence_landscape multiply_by_scalar = 10*p;
+	
+	//sum.print_to_file("sum");
+	//difference.print_to_file("difference");
+	//multiply_by_scalar.print_to_file("multiply_by_scalar");
+	
+	Persistence_landscape template_sum;
+	template_sum.load_landscape_from_file( "sum" );
+	Persistence_landscape template_difference;
+	template_difference.load_landscape_from_file( "difference" );
+	Persistence_landscape template_multiply_by_scalar;
+	template_multiply_by_scalar.load_landscape_from_file( "multiply_by_scalar" );
+	
+	if ( sum != template_sum )
+	{
+		cerr << "Problem with sums \n";
+	}
+	if ( difference != template_difference )
+	{
+		cerr << "Problem with differences \n";
+	}
+	if ( multiply_by_scalar != template_multiply_by_scalar )
+	{
+		cerr << "Problem with multiplication by scalar \n";
+	}
+	
+	
+	
+	cout << "Maximum : " << p.compute_maximum() << endl;
+	
+	cout << "L^1 norm : " << p.compute_norm_of_landscape(1) << endl;
+	cout << "L^2 norm : " << p.compute_norm_of_landscape(2) << endl;
+	cout << "L^3 norm : " << p.compute_norm_of_landscape(3) << endl;	
+	
+	
+	cout << "L^1 distance : " << compute_discance_of_landscapes(p,sum,1) << endl;
+	cout << "L^2 distance : " << compute_discance_of_landscapes(p,sum,2) << endl;
+	cout << "L^infty distance : " << compute_discance_of_landscapes(p,sum,-1) << endl;
+	
+	{
+		Persistence_landscape p( "../test/data/file_with_diagram" );
+		Persistence_landscape q( "../test/data/file_with_diagram_1" );
+		std::vector< Abs_Topological_data_with_averages* > to_average;
+		to_average.push_back( &p );
+		to_average.push_back( &q );
+		Persistence_landscape av;
+		av.compute_average( to_average );
+	
+		Persistence_landscape template_average;
+		template_average.load_landscape_from_file( "average" );
+		if ( template_average != av )
+		{
+			cerr << "We have a problem with average \n";
+		}
+	}
+	
+	
+	{
+		Persistence_landscape p( "../test/data/file_with_diagram" );
+		Persistence_landscape q( "../test/data/file_with_diagram_1" );
+		cout << "L^1 distance : " <<  p.distance( &q ) << endl;
+		cout << "L^2 distance : " <<  p.distance( &q , 2) << endl;
+		cout << "L^infty distance : " <<  p.distance( &q , -1 ) << endl;
+	}
+	
+	
+	{
+		Persistence_landscape p( "../test/data/file_with_diagram" );
+		Persistence_landscape q( "../test/data/file_with_diagram_1" );
+		cout << "Scalar product : " <<  p.compute_scalar_product( &q ) << endl;
+		
+	}
+	
+	return 0;
+}