Add an "interpolator reference image" page to the docs

docs/make.jl

@@ -16,7 +16,8 @@ makedocs(;
         "Home" => "index.md",
         "General TopoPlots" => "general.md",
         "EEG" => "eeg.md",
-        "Function reference" => "functions.md"
+        "Function reference" => "functions.md",
+        "Interpolator reference images" => "interpolator_reference.md"
     ],
 )
 

docs/src/interpolator_reference.md

@@ -0,0 +1,101 @@
+# Interpolator reference
+
+This file contains reference figures showing the output of each interpolator available in TopoPlots, as well as timings for them. 
+
+It is a more comprehensive version of the plot in [Interpolation](@ref).
+
+### Example data
+
+```@example 1
+
+using TopoPlots, CairoMakie, ScatteredInterpolation, NaturalNeighbours
+
+data, positions = TopoPlots.example_data()
+
+f = Figure(size=(1000, 1500))
+
+interpolators = [
+    SplineInterpolator() NullInterpolator() DelaunayMesh();
+    CloughTocher() ScatteredInterpolationMethod(ThinPlate()) ScatteredInterpolationMethod(Shepard(3));
+    ScatteredInterpolationMethod(Multiquadratic()) ScatteredInterpolationMethod(InverseMultiquadratic()) ScatteredInterpolationMethod(Gaussian());
+    NaturalNeighboursMethod(Hiyoshi(2)) NaturalNeighboursMethod(Sibson()) NaturalNeighboursMethod(Laplace());
+    NaturalNeighboursMethod(Farin()) NaturalNeighboursMethod(Sibson(1)) NaturalNeighboursMethod(Nearest());
+    ]
+
+data_slice = data[:, 360, 1]
+
+for idx in CartesianIndices(interpolators)
+    interpolation = interpolators[idx]
+
+    # precompile to get accurate measurements
+    TopoPlots.topoplot(
+        data_slice, positions;
+        contours=true, interpolation=interpolation,
+        labels = string.(1:length(positions)), colorrange=(-1, 1),
+        label_scatter=(markersize=10,),
+        axis=(type=Axis, title="...", aspect=DataAspect(),))
+
+    # measure time, to give an idea of what speed to expect from the different interpolators
+    t = @elapsed ax, pl = TopoPlots.topoplot(
+        f[Tuple(idx)...], data_slice, positions;
+        contours=true,
+        interpolation=interpolation,
+        labels = string.(1:length(positions)), colorrange=(-1, 1),
+        label_scatter=(markersize=10,),
+        axis=(type=Axis, title="$(typeof(interpolation))()",aspect=DataAspect(),))
+
+   ax.title = ("$(typeof(interpolation))() - $(round(t, digits=2))s")
+   if interpolation isa Union{NaturalNeighboursMethod, ScatteredInterpolationMethod}
+       ax.title = "$(typeof(interpolation))() - $(round(t, digits=2))s"
+       ax.subtitle = string(typeof(interpolation.method))
+   end
+end
+f
+```
+
+### Randomly sampled function
+
+```@example 1
+data = Makie.peaks(100)
+sampling_points = rand(CartesianIndices(data), 100)
+data_slice = data[sampling_points]
+positions = Point2f.(Tuple.(sampling_points))
+
+interpolators = [
+    SplineInterpolator(; smoothing = 5) NullInterpolator() DelaunayMesh();
+    CloughTocher() ScatteredInterpolationMethod(ThinPlate()) ScatteredInterpolationMethod(Shepard(3));
+    ScatteredInterpolationMethod(Multiquadratic()) ScatteredInterpolationMethod(InverseMultiquadratic()) ScatteredInterpolationMethod(Gaussian());
+    NaturalNeighboursMethod(Hiyoshi(2)) NaturalNeighboursMethod(Sibson()) NaturalNeighboursMethod(Laplace());
+    NaturalNeighboursMethod(Farin()) NaturalNeighboursMethod(Sibson(1)) NaturalNeighboursMethod(Nearest());
+    ]
+
+f = Figure(; size = (1000, 1500))
+
+for idx in CartesianIndices(interpolators)
+    interpolation = interpolators[idx]
+
+    # precompile to get accurate measurements
+    TopoPlots.topoplot(
+        data_slice, positions;
+        contours=true, interpolation=interpolation,
+        labels = string.(1:length(positions)), colorrange=(-1, 1),
+        label_scatter=(markersize=10,),
+        axis=(type=Axis, title="...", aspect=DataAspect(),))
+
+    # measure time, to give an idea of what speed to expect from the different interpolators
+    t = @elapsed ax, pl = TopoPlots.topoplot(
+        f[Tuple(idx)...], data_slice, positions;
+        contours=true,
+        interpolation=interpolation,
+        labels = string.(1:length(positions)), colorrange=(-1, 1),
+        label_scatter=(markersize=10,),
+        axis=(type=Axis, title="$(typeof(interpolation))()",aspect=DataAspect(),))
+
+   ax.title = ("$(typeof(interpolation))() - $(round(t, digits=2))s")
+   if interpolation isa Union{NaturalNeighboursMethod, ScatteredInterpolationMethod}
+       ax.title = "$(typeof(interpolation))() - $(round(t, digits=2))s"
+       ax.subtitle = string(typeof(interpolation.method))
+   end
+end
+f
+```