fdtd compile with make VERSION="fdtd1d_v1.cpp" run with clear; ./fdtd -k 200 -f 700e6 -t 6e8 -n 500 or multiple runs for i in {100..2000..50}; do clear; ./fdtd -k 200 -f 700e6 -t 6e8 -n $i; sleep 0.5; done