---- To compare density difference of realtime process under either normal kernel or preemptive kernel, do plot "result1/realtime.dist" u 1:4 t "normal", \ "result1/realtime-prek.dist" u 1:4 t "pre-k" plot "result2/realtime.dist" u 1:4 t "normal", \ "result2/realtime-prek.dist" u 1:4 t "pre-k" ---- To see the distribution curves of data and fitting Normal random variates, for normal kernel: plot "result1/realtime.dist" u 1:2 t "exp. data", \ "result1/realtime.dist" u 1:3 t "Normal curve" plot "result2/realtime.dist" u 1:2 t "exp. data", \ "result2/realtime.dist" u 1:3 t "Normal curve" for preemptive kernel: plot "result1/realtime-prek.dist" u 1:2 t "exp. data", \ "result1/realtime-prek.dist" u 1:3 t "Normal curve" plot "result2/realtime-prek.dist" u 1:2 t "exp. data", \ "result2/realtime-prek.dist" u 1:3 t "Normal curve"