Merge pull request 'Change deviation to absolute value' (#15) from coryab/code into develop

Reviewed-on: #15

lib/WaveSimulation.cpp

@@ -308,7 +308,7 @@ void WaveSimulation::probability_deviation(std::string outfile,
     if (write_each_step) {
         for (size_t i = 0; i < iterations; i++) {
             sum = arma::accu(this->U % arma::conj(this->U)).real();
-            ofile << i*this->dt << '\t' << 1. - sum << '\n';
+            ofile << i*this->dt << '\t' << std::abs(1. - sum) << '\n';
             this->step();
         }
     }
@@ -318,7 +318,7 @@ void WaveSimulation::probability_deviation(std::string outfile,
         }
     }
     sum = arma::accu(this->U % arma::conj(this->U)).real();
-    ofile << this->T << '\t' << 1. - sum << '\n';
+    ofile << this->T << '\t' << std::abs(1. - sum) << '\n';
     ofile.close();
 }