IO: Optionally disable initial state outputs

Now the user can optionally disable outputting the initial opinions
and network. By default, the initial opinions and network are always
printed.

examples/ActivityDriven/conf.toml

@@ -6,6 +6,7 @@ model = "ActivityDriven"
 n_output_network = 20 # Write the network every 20 iterations
 n_output_agents = 1 # Write the opinions of agents after every iteration
 print_progress = true # Print the iteration time ; if not set, then always print
+print_initial = true # Print the initial opinions and network file from step 0. If not set, this is true by default.
 start_print_iteration = 1 # Start printing opinions and/or network files from this iteration. If not set, this is 1.
 
 [model]

examples/ActivityDrivenBot/conf.toml

@@ -6,6 +6,7 @@ rng_seed = 120           # Leaving this empty will pick a random seed
 n_output_network = 1  # Write the network every 20 iterations
 n_output_agents = 1 # Write the opinions of agents after every iteration
 print_progress = true # Print the iteration time; if not set, then always print
+print_initial = true # Print the initial opinions and network file from step 0. If not set, this is true by default.
 start_print_iteration = 1 # Start printing opinions and/or network files from this iteration. If not set, this is 1.
 
 [model]

examples/ActivityDrivenMeanField/conf.toml

@@ -6,6 +6,7 @@ rng_seed = 12345678 # Leaving this empty will pick a random seed
 n_output_network = 20 # Write the network every 20 iterations
 n_output_agents = 1 # Write the opinions of agents after every iteration
 print_progress = true # Print the iteration time ; if not set, then always print
+print_initial = true # Print the initial opinions and network file from step 0. If not set, this is true by default.
 start_print_iteration = 1 # Start printing opinions and/or network files from this iteration. If not set, this is 1.
 
 [model]

examples/DeGroot/conf.toml

@@ -6,6 +6,7 @@ model = "DeGroot"
 n_output_network = 20 # Write the network every 20 iterations
 n_output_agents = 1 # Write the opinions of agents after every iteration
 print_progress = false # Print the iteration time ; if not set, then always prints
+print_initial = true # Print the initial opinions and network file from step 0. If not set, this is true by default.
 start_print_iteration = 1 # Start printing opinions and/or network files from this iteration. If not set, this is 1.
 
 [model]

include/config_parser.hpp

@@ -32,6 +32,7 @@ struct OutputSettings
     std::optional<size_t> n_output_agents  = std::nullopt;
     std::optional<size_t> n_output_network = std::nullopt;
     bool print_progress                    = true; // Print the iteration time, by default always prints
+    bool print_initial                     = true; // Output initial opinions and network, by default always outputs.
     int start_print_iteration = 1; // Start printing opinion and/or network files from this iteration number
 };
 

include/simulation.hpp

@@ -139,15 +139,18 @@ class Simulation : public SimulationInterface
         auto n_output_agents  = this->output_settings.n_output_agents;
         auto n_output_network = this->output_settings.n_output_network;
         auto print_iter_start = this->output_settings.start_print_iteration;
+        auto print_initial    = this->output_settings.print_initial;
 
         fmt::print( "-----------------------------------------------------------------\n" );
         fmt::print( "Starting simulation\n" );
         fmt::print( "-----------------------------------------------------------------\n" );
 
-        Seldon::IO::network_to_file( network, ( output_dir_path / fs::path( "network_0.txt" ) ).string() );
-        auto filename = fmt::format( "opinions_{}.txt", 0 );
-        Seldon::IO::opinions_to_file( network, ( output_dir_path / fs::path( filename ) ).string() );
-
+        if( print_initial )
+        {
+            Seldon::IO::network_to_file( network, ( output_dir_path / fs::path( "network_0.txt" ) ).string() );
+            auto filename = fmt::format( "opinions_{}.txt", 0 );
+            Seldon::IO::opinions_to_file( network, ( output_dir_path / fs::path( filename ) ).string() );
+        }
         this->model->initialize_iterations();
 
         typedef std::chrono::milliseconds ms;

src/config_parser.cpp

@@ -39,6 +39,8 @@ SimulationOptions parse_config_file( std::string_view config_file_path )
     options.output_settings.n_output_agents  = tbl["io"]["n_output_agents"].value<size_t>();
     options.output_settings.print_progress
         = tbl["io"]["print_progress"].value_or<bool>( bool( options.output_settings.print_progress ) );
+    options.output_settings.print_initial
+        = tbl["io"]["print_initial"].value_or<bool>( bool( options.output_settings.print_initial ) );
     // @TODO: default value should not be hard-coded here
     options.output_settings.start_print_iteration = tbl["io"]["start_print_iteration"].value_or<int>( 1 );