1 files changed, 44 insertions, 0 deletions
diff --git a/src/Witness_complex/example/example_nearest_landmark_table.cpp b/src/Witness_complex/example/example_nearest_landmark_table.cpp
new file mode 100644
index 00000000..441900c1
--- /dev/null
+++ b/src/Witness_complex/example/example_nearest_landmark_table.cpp
@@ -0,0 +1,44 @@
+#define BOOST_PARAMETER_MAX_ARITY 12
+
+#include <gudhi/Simplex_tree.h>
+#include <gudhi/Witness_complex.h>
+#include <gudhi/Persistent_cohomology.h>
+
+#include <iostream>
+#include <fstream>
+#include <utility>
+#include <string>
+#include <vector>
+
+int main(int argc, char * const argv[]) {
+  using Nearest_landmark_range = std::vector<std::pair<std::size_t, double>>;
+  using Nearest_landmark_table = std::vector<Nearest_landmark_range>;
+  using Witness_complex = Gudhi::witness_complex::Witness_complex<Nearest_landmark_table>;
+  using Simplex_tree = Gudhi::Simplex_tree<>;
+  using Field_Zp = Gudhi::persistent_cohomology::Field_Zp;
+  using Persistent_cohomology = Gudhi::persistent_cohomology::Persistent_cohomology<Simplex_tree, Field_Zp>;
+
+  Simplex_tree simplex_tree;
+
+  // Example contains 5 witnesses and 5 landmarks
+  Nearest_landmark_table nlt = {
+    {{0, 0.0}, {1, 0.1}, {2, 0.2}, {3, 0.3}, {4, 0.4}}, // witness 0
+    {{1, 0.0}, {2, 0.1}, {3, 0.2}, {4, 0.3}, {0, 0.4}}, // witness 1
+    {{2, 0.0}, {3, 0.1}, {4, 0.2}, {0, 0.3}, {1, 0.4}}, // witness 2
+    {{3, 0.0}, {4, 0.1}, {0, 0.2}, {1, 0.3}, {2, 0.4}}, // witness 3
+    {{4, 0.0}, {0, 0.1}, {1, 0.2}, {2, 0.3}, {3, 0.4}}  // witness 4
+  };
+  /* distance(witness3, landmark3) is 0, distance(witness3, landmark4) is 0.1, etc.  */
+
+  Witness_complex witness_complex(nlt);
+  witness_complex.create_complex(simplex_tree, .41);
+
+  std::cout << "Number of simplices: " << simplex_tree.num_simplices() << std::endl;
+
+  Persistent_cohomology pcoh(simplex_tree);
+  // initializes the coefficient field for homology
+  pcoh.init_coefficients(11);
+
+  pcoh.compute_persistent_cohomology(-0.1);
+  pcoh.output_diagram();
+}