Julia Plots

複数のグラフを書きたいときは
plot!
つかう
gui()
でウインドウ表示(
julia -i
しないと一瞬で消えてしまう)

using Plots
# plot graph
# NOTE: require `-i` option for preserving graph window.
 xs = range(-0.12 ,stop = 0.12, length=100)
 plot(xs, heaviside, label="heaviside")
 for r in 1:10
   plot!(xs, h_approx(r), label="approx r = $r")
 end
 gui()