add line plot with broken y axis example

examples/2d/lines/line_broken_axis.jl

@@ -0,0 +1,82 @@
+# ## broken y axis
+
+# ![](line_broken_y_axis.svg) 
+
+using CairoMakie
+CairoMakie.activate!(type="svg") #hide
+
+# define some data
+x = [1, 2, 3, 4, 5, 6, 7, 8]
+y = [1.6022884252337856e-15
+    1.0982140221904354e-15
+    5.463801624996023e-15
+    5.317256161421627e-7
+    8.476518770185598e-5
+    0.0005105758346367672
+    0.006769803152530791
+    0.0791149895645982]
+
+fig = Figure()
+gL = GridLayout(fig[1, 1])
+
+row1 = 1
+row2 = 2
+
+ax_top = Axis(gL[1, 1], yscale=log10, ygridvisible=false, xgridvisible=false)
+ax_bot = Axis(gL[2, 1], yscale=log10, xlabel="x axis label", ygridvisible=false, xgridvisible=false)
+
+Label(gL[1:2, 1, Left()], "y axis Label", rotation=π / 2, padding=(0, 60, 0, 0))
+
+below_break_min = 1E-16
+below_break_max = 1E-14
+above_break_min = 1E-6
+above_break_max = 1E-1
+
+ax_top_fraction = 0.65
+ax_bot_fraction = 1 - ax_top_fraction
+
+below_break = (below_break_min, below_break_max)
+above_break = (above_break_min, above_break_max)
+lims = Observable((below_break, above_break))
+on(lims) do (bottom, top)
+    ylims!(ax_bot, bottom)
+    ylims!(ax_top, top)
+    rowsize!(gL, row1, Auto(ax_top_fraction))
+    rowsize!(gL, row2, Auto(ax_bot_fraction))
+end
+
+hidexdecorations!(ax_top, grid=false)
+ax_top.bottomspinevisible = false
+ax_bot.topspinevisible = false
+
+linkxaxes!(ax_top, ax_bot)
+gap_size = 25
+rowgap!(gL, gap_size)
+
+angle_ = pi / 8
+linelength = 10
+
+segments = lift(
+    @lift($(ax_top.yaxis.attributes.endpoints)[1]),
+    @lift($(ax_bot.yaxis.attributes.endpoints)[2]),
+    @lift($(ax_top.elements[:yoppositeline][1])[1]),
+    @lift($(ax_bot.elements[:yoppositeline][1])[2]),
+) do p1, p2, p3, p4
+    ps = Point2f[p1, p2, p3, p4]
+
+    map(ps) do p
+        a = p + Point2f(cos(angle_), sin(angle_)) * 0.5 * linelength
+        b = p - Point2f(cos(angle_), sin(angle_)) * 0.5 * linelength
+        (a, b)
+    end
+end
+
+linesegments!(fig.scene, segments, color=:black)
+
+scatterlines!(ax_top, x, y)
+scatterlines!(ax_bot, x, y)
+hlines!(ax_top, above_break_min, linestyle=:dash, color=:gray)
+hlines!(ax_bot, below_break_max, linestyle=:dash, color=:gray)
+notify(lims)
+
+save("line_broken_y_axis.svg", current_figure()); # hide