neuron model Integrate-and-fire if.rs cargo run --release --bin if gnuplot -p < if.plt Hodgkin–Huxley hh.rs cargo run --release --bin hh gnuplot -p < hh.plt Izhikevich iz.rs cargo run --release --bin iz gnuplot -p < iz.plt FitzHugh-Nagumo fn.rs cargo run --release --bin fn gnuplot -p < fn.plt Poisson Spike ps.rs cargo run --release --bin ps gnuplot -p < ps.plt