diff --git a/examples/BTCS_1D_proto_example.cpp b/examples/BTCS_1D_proto_example.cpp
index f7e7a18..1a53738 100644
--- a/examples/BTCS_1D_proto_example.cpp
+++ b/examples/BTCS_1D_proto_example.cpp
@@ -1,5 +1,8 @@
+#include <Eigen/Eigen>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+
 int main(int argc, char *argv[]) {
   // **************
   // **** GRID ****
@@ -45,4 +48,4 @@ int main(int argc, char *argv[]) {
 
   // run the simulation
   simulation.run();
-}
\ No newline at end of file
+}
diff --git a/examples/BTCS_2D_proto_example.cpp b/examples/BTCS_2D_proto_example.cpp
index f65f572..9a103cb 100644
--- a/examples/BTCS_2D_proto_example.cpp
+++ b/examples/BTCS_2D_proto_example.cpp
@@ -1,5 +1,8 @@
+#include <Eigen/Eigen>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+
 int main(int argc, char *argv[]) {
   // EASY_PROFILER_ENABLE;
   // profiler::startListen();
@@ -79,4 +82,4 @@ int main(int argc, char *argv[]) {
   // EASY_END_BLOCK;
   // profiler::dumpBlocksToFile("test_profile.prof");
   // profiler::stopListen();
-}
\ No newline at end of file
+}
diff --git a/examples/CRNI_2D_proto_example.cpp b/examples/CRNI_2D_proto_example.cpp
index 770fd42..39262e7 100644
--- a/examples/CRNI_2D_proto_example.cpp
+++ b/examples/CRNI_2D_proto_example.cpp
@@ -1,5 +1,8 @@
+#include <Eigen/Eigen>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+
 int main(int argc, char *argv[]) {
   int row = 20;
   int col = 20;
@@ -21,4 +24,4 @@ int main(int argc, char *argv[]) {
   simulation.setOutputCSV(CSV_OUTPUT_XTREME);
 
   simulation.run();
-}
\ No newline at end of file
+}
diff --git a/examples/FTCS_1D_proto_example.cpp b/examples/FTCS_1D_proto_example.cpp
index 0b2ee83..e97f0be 100644
--- a/examples/FTCS_1D_proto_example.cpp
+++ b/examples/FTCS_1D_proto_example.cpp
@@ -1,6 +1,9 @@
 #include "tug/Boundary.hpp"
+#include <Eigen/Eigen>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+
 int main(int argc, char *argv[]) {
   // **************
   // **** GRID ****
@@ -44,4 +47,4 @@ int main(int argc, char *argv[]) {
 
   // run the simulation
   simulation.run();
-}
\ No newline at end of file
+}
diff --git a/examples/FTCS_2D_proto_closed_mdl.cpp b/examples/FTCS_2D_proto_closed_mdl.cpp
index a297734..845d36f 100644
--- a/examples/FTCS_2D_proto_closed_mdl.cpp
+++ b/examples/FTCS_2D_proto_closed_mdl.cpp
@@ -6,10 +6,13 @@
  *
  */
 
+#include <Eigen/Eigen>
 #include <cstdlib>
 #include <iostream>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+
 int main(int argc, char *argv[]) {
 
   int row = 64;
diff --git a/examples/FTCS_2D_proto_example.cpp b/examples/FTCS_2D_proto_example.cpp
index 058810d..5f5e520 100644
--- a/examples/FTCS_2D_proto_example.cpp
+++ b/examples/FTCS_2D_proto_example.cpp
@@ -6,7 +6,10 @@
  *
  */
 
+#include <Eigen/Eigen>
 #include <tug/Simulation.hpp>
+
+using namespace Eigen;
 // #include <easy/profiler.h>
 // #define EASY_PROFILER_ENABLE ::profiler::setEnabled(true);
 
@@ -85,4 +88,4 @@ int main(int argc, char *argv[]) {
   // EASY_END_BLOCK;
   // profiler::dumpBlocksToFile("test_profile.prof");
   // profiler::stopListen();
-}
\ No newline at end of file
+}
diff --git a/examples/FTCS_2D_proto_example_mdl.cpp b/examples/FTCS_2D_proto_example_mdl.cpp
index 9189555..2c63c0c 100644
--- a/examples/FTCS_2D_proto_example_mdl.cpp
+++ b/examples/FTCS_2D_proto_example_mdl.cpp
@@ -6,8 +6,11 @@
  *
  */
 
+#include <Eigen/Eigen>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+
 int main(int argc, char *argv[]) {
 
   // **************
diff --git a/examples/profiling_openmp.cpp b/examples/profiling_openmp.cpp
index 92b5b12..5dc13ef 100644
--- a/examples/profiling_openmp.cpp
+++ b/examples/profiling_openmp.cpp
@@ -1,9 +1,13 @@
+#include <Eigen/Eigen>
 #include <chrono>
 #include <fstream>
 #include <iostream>
 #include <string>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+using namespace std;
+
 int main(int argc, char *argv[]) {
 
   int n[] = {2000};
@@ -63,4 +67,4 @@ int main(int argc, char *argv[]) {
     }
     myfile.close();
   }
-}
\ No newline at end of file
+}
diff --git a/examples/profiling_speedup.cpp b/examples/profiling_speedup.cpp
index 92b5b12..5dc13ef 100644
--- a/examples/profiling_speedup.cpp
+++ b/examples/profiling_speedup.cpp
@@ -1,9 +1,13 @@
+#include <Eigen/Eigen>
 #include <chrono>
 #include <fstream>
 #include <iostream>
 #include <string>
 #include <tug/Simulation.hpp>
 
+using namespace Eigen;
+using namespace std;
+
 int main(int argc, char *argv[]) {
 
   int n[] = {2000};
@@ -63,4 +67,4 @@ int main(int argc, char *argv[]) {
     }
     myfile.close();
   }
-}
\ No newline at end of file
+}
diff --git a/examples/reference-FTCS_2D_closed.cpp b/examples/reference-FTCS_2D_closed.cpp
index 09dad0d..340a6fd 100644
--- a/examples/reference-FTCS_2D_closed.cpp
+++ b/examples/reference-FTCS_2D_closed.cpp
@@ -3,6 +3,7 @@
 #include <tug/Simulation.hpp>
 
 using namespace std;
+using namespace Eigen;
 
 int main(int argc, char *argv[]) {
   int row = 50;
@@ -48,4 +49,4 @@ int main(int argc, char *argv[]) {
 
   // RUN
   sim.run();
-}
\ No newline at end of file
+}