voronoiplot
voronoiplot(x, y, values; kwargs...)
voronoiplot(values; kwargs...)
voronoiplot(x, y; kwargs...)
voronoiplot(positions; kwargs...)
voronoiplot(vorn::VoronoiTessellation; kwargs...)Generates and plots a Voronoi tessalation from heatmap- or point-like data. The tessellation can also be passed directly as a VoronoiTessellation from DelaunayTriangulation.jl.
Plot type
The plot type alias for the voronoiplot function is Voronoiplot.
Attributes
alpha = 1.0 — The alpha value of the colormap or color attribute. Multiple alphas like in plot(alpha=0.2, color=(:red, 0.5), will get multiplied.
clip = automatic — Sets the clipping area for the generated polygons which can be a Rect2 (or BBox), Tuple with entries (xmin, xmax, ymin, ymax) or as a Circle. Anything outside the specified area will be removed. If the clip is not set it is automatically determined using unbounded_edge_extension_factor as a Rect.
color = automatic — Sets the color of the polygons. If automatic, the polygons will be individually colored according to the colormap.
colormap = @inherit colormap :viridis — Sets the colormap that is sampled for numeric colors. PlotUtils.cgrad(...), Makie.Reverse(any_colormap) can be used as well, or any symbol from ColorBrewer or PlotUtils. To see all available color gradients, you can call Makie.available_gradients().
colorrange = automatic — The values representing the start and end points of colormap.
colorscale = identity — The color transform function. Can be any function, but only works well together with Colorbar for identity, log, log2, log10, sqrt, logit, Makie.pseudolog10 and Makie.Symlog10.
highclip = automatic — The color for any value above the colorrange.
lowclip = automatic — The color for any value below the colorrange.
marker = @inherit marker — Sets the shape of the points.
markercolor = @inherit markercolor — Sets the color of the points.
markersize = @inherit markersize — Sets the size of the points.
nan_color = :transparent — The color for NaN values.
show_generators = true — Determines whether to plot the individual generators.
smooth = false — No docs available.
strokecolor = @inherit patchstrokecolor — Sets the strokecolor of the polygons.
strokewidth = 1.0 — Sets the width of the polygon stroke.
unbounded_edge_extension_factor = 0.1 — Sets the extension factor for the unbounded edges, used in DelaunayTriangulation.polygon_bounds.
Examples
A voronoiplot generates a cell for each passed position similar to heatmap, however the cells are not restricted to a rectangular shape. It can be called with point based (like scatter or lines) or heatmap-like inputs.
using CairoMakie
using Random
Random.seed!(1234)
f = Figure(size=(1200, 450))
ax = Axis(f[1, 1])
voronoiplot!(ax, rand(Point2f, 50))
ax = Axis(f[1, 2])
voronoiplot!(ax, rand(10, 10), rand(10, 10), rand(10, 10))
f
voronoiplot uses the Voronoi tessellation from DelaunayTriangulation.jl to generate the cells. You can also do this yourself and directly plot the VoronoiTessellation object returned.
using CairoMakie
using DelaunayTriangulation
using Random
Random.seed!(1234)
points = rand(2, 50)
tri = triangulate(points)
vorn = voronoi(tri)
f, ax, tr = voronoiplot(vorn)
f
When considering standard tessellations the unbounded polygons are clipped at a bounding box determined automatically by default, or from a user-provided clipping shape (a rectangle or circle). The automatic bounding box is determined by the bounding box of generators of the tessellation, meaning the provided points, extended out by some factor unbounded_edge_extension_factor (default 0.1) proportional to the lengths of the bounding box's sides.
using CairoMakie
using DelaunayTriangulation
using Random
Random.seed!(1234)
z = LinRange(0, 1, 250) .* exp.(LinRange(0, 16pi, 250) .* im)
f, ax, tr = voronoiplot(real(z), imag(z), unbounded_edge_extension_factor = 0.4, markersize = 7)
f
using CairoMakie
using DelaunayTriangulation
using Random
Random.seed!(1234)
x = LinRange(0, 16pi, 50)
y = sin.(x)
bb = BBox(-1, 16pi + 1, -30, 30) # (xmin, xmax, ymin, ymax)
f, ax, tr = voronoiplot(x, y, show_generators=false,
clip=bb, color=:white, strokewidth=2)
f
For clipped and centroidal tessellations, there are no unbounded polygons.
using CairoMakie
using DelaunayTriangulation
using Random
Random.seed!(1234)
points = [(0.0, 0.0), (1.0, 0.0), (1.0, 1.0), (0.0, 1.0)]
tri = triangulate(points)
refine!(tri; max_area = 0.001)
vorn = voronoi(tri, clip = true)
f, ax, tr = voronoiplot(vorn, show_generators = true, markersize = 13, marker = 'x')
f
using CairoMakie
using DelaunayTriangulation
using Random
Random.seed!(1234)
angles = range(0, 2pi, length = 251)[1:end-1]
x = cos.(angles)
y = sin.(angles)
points = tuple.(x, y)
tri = triangulate(points)
refine!(tri; max_area = 0.001)
vorn = voronoi(tri, clip = true)
smooth_vorn = centroidal_smooth(vorn)
f, ax, tr = voronoiplot(smooth_vorn, show_generators=false)
f
These docs were autogenerated using Makie: v0.21.0, GLMakie: v0.10.0, CairoMakie: v0.12.0, WGLMakie: v0.10.0
