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contour ​

# Makie.contour — Function.
julia
contour(x, y, z)
contour(z::Matrix)

Creates a contour plot of the plane spanning x::Vector, y::Vector, z::Matrix. If only z::Matrix is supplied, the indices of the elements in z will be used as the x and y locations when plotting the contour.

Plot type

The plot type alias for the contour function is Contour.

source


Examples ​

julia
using CairoMakie
f = Figure()
Axis(f[1, 1])

xs = LinRange(0, 10, 100)
ys = LinRange(0, 15, 100)
zs = [cos(x) * sin(y) for x in xs, y in ys]

contour!(xs, ys, zs)

f

Omitting the xs and ys results in the indices of zs being used. We can also set arbitrary contour-levels using levels

julia
using CairoMakie
f = Figure()
Axis(f[1, 1])

xs = LinRange(0, 10, 100)
ys = LinRange(0, 15, 100)
zs = [cos(x) * sin(y) for x in xs, y in ys]

contour!(zs,levels=-1:0.1:1)

f

One can also add labels and control label attributes such as labelsize, labelcolor or labelfont.

julia
using CairoMakie
himmelblau(x, y) = (x^2 + y - 11)^2 + (x + y^2 - 7)^2
x = y = range(-6, 6; length=100)
z = himmelblau.(x, y')

levels = 10.0.^range(0.3, 3.5; length=10)
colorscale = ReversibleScale(x -> x^(1 / 10), x -> x^10)
f, ax, ct = contour(x, y, z; labels=true, levels, colormap=:hsv, colorscale)
f

Attributes ​

alpha ​

Defaults to 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.

color ​

Defaults to nothing

The color of the contour lines. If nothing, the color is determined by the numerical values of the contour levels in combination with colormap and colorrange.

colormap ​

Defaults to @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 ​

Defaults to automatic

The values representing the start and end points of colormap.

colorscale ​

Defaults to 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.

depth_shift ​

Defaults to 0.0

adjusts the depth value of a plot after all other transformations, i.e. in clip space, where 0 <= depth <= 1. This only applies to GLMakie and WGLMakie and can be used to adjust render order (like a tunable overdraw).

enable_depth ​

Defaults to true

No docs available.

fxaa ​

Defaults to true

adjusts whether the plot is rendered with fxaa (anti-aliasing, GLMakie only).

highclip ​

Defaults to automatic

The color for any value above the colorrange.

inspectable ​

Defaults to true

sets whether this plot should be seen by DataInspector.

inspector_clear ​

Defaults to automatic

Sets a callback function (inspector, plot) -> ... for cleaning up custom indicators in DataInspector.

inspector_hover ​

Defaults to automatic

Sets a callback function (inspector, plot, index) -> ... which replaces the default show_data methods.

inspector_label ​

Defaults to automatic

Sets a callback function (plot, index, position) -> string which replaces the default label generated by DataInspector.

joinstyle ​

Defaults to @inherit joinstyle

No docs available.

labelcolor ​

Defaults to nothing

Color of the contour labels, if nothing it matches color by default.

labelfont ​

Defaults to @inherit font

The font of the contour labels.

labelformatter ​

Defaults to contour_label_formatter

Formats the numeric values of the contour levels to strings.

labels ​

Defaults to false

If true, adds text labels to the contour lines.

labelsize ​

Defaults to 10

Font size of the contour labels

levels ​

Defaults to 5

Controls the number and location of the contour lines. Can be either

  • an Int that produces n equally wide levels or bands

  • an AbstractVector{<:Real} that lists n consecutive edges from low to high, which result in n-1 levels or bands

linecap ​

Defaults to @inherit linecap

No docs available.

linestyle ​

Defaults to nothing

No docs available.

linewidth ​

Defaults to 1.0

No docs available.

lowclip ​

Defaults to automatic

The color for any value below the colorrange.

miter_limit ​

Defaults to @inherit miter_limit

No docs available.

model ​

Defaults to automatic

Sets a model matrix for the plot. This overrides adjustments made with translate!, rotate! and scale!.

nan_color ​

Defaults to :transparent

The color for NaN values.

overdraw ​

Defaults to false

Controls if the plot will draw over other plots. This specifically means ignoring depth checks in GL backends

space ​

Defaults to :data

sets the transformation space for box encompassing the plot. See Makie.spaces() for possible inputs.

ssao ​

Defaults to false

Adjusts whether the plot is rendered with ssao (screen space ambient occlusion). Note that this only makes sense in 3D plots and is only applicable with fxaa = true.

transformation ​

Defaults to automatic

No docs available.

transparency ​

Defaults to false

Adjusts how the plot deals with transparency. In GLMakie transparency = true results in using Order Independent Transparency.

visible ​

Defaults to true

Controls whether the plot will be rendered or not.