Examples

streamplot

streamplot(f::function, xinterval, yinterval; color = norm, kwargs...)

f must either accept f(::Point) or f(x::Number, y::Number). f must return a Point2.

Example:

v(x::Point2{T}) where T = Point2f(x[2], 4*x[1])
streamplot(v, -2..2, -2..2)

One can choose the color of the lines by passing a function color_func(dx::Point) to the color attribute. By default this is set to norm, but can be set to any function or composition of functions. The dx which is passed to color_func is the output of f at the point being colored.

Attributes

Available attributes and their defaults for Plot{Makie.streamplot} are:

  alpha           1.0
  arrow_head      MakieCore.Automatic()
  arrow_size      MakieCore.Automatic()
  color           LinearAlgebra.norm
  colormap        :viridis
  colorrange      MakieCore.Automatic()
  colorscale      identity
  density         1.0
  depth_shift     0.0f0
  gridsize        (32, 32, 32)
  highclip        MakieCore.Automatic()
  inspectable     true
  linestyle       "nothing"
  linewidth       1.5
  lowclip         MakieCore.Automatic()
  maxsteps        500
  nan_color       :transparent
  overdraw        false
  quality         16
  space           :data
  ssao            false
  stepsize        0.01
  transparency    false
  visible         true

Implementation

See the function Makie.streamplot_impl for implementation details.

Examples

using CairoMakie


struct FitzhughNagumo{T}
    ϵ::T
    s::T
    γ::T
    β::T
end

P = FitzhughNagumo(0.1, 0.0, 1.5, 0.8)

f(x, P::FitzhughNagumo) = Point2f(
    (x[1]-x[2]-x[1]^3+P.s)/P.ϵ,
    P.γ*x[1]-x[2] + P.β
)

f(x) = f(x, P)

fig, ax, pl = streamplot(f, -1.5..1.5, -1.5..1.5, colormap = :magma)
# you can also pass a function to `color`, to either return a number or color value
streamplot(fig[1,2], f, -1.5 .. 1.5, -1.5 .. 1.5, color=(p)-> RGBAf(p..., 0.0, 1))
fig

These docs were autogenerated using Makie: v0.20.9, GLMakie: v0.9.10, CairoMakie: v0.11.10, WGLMakie: v0.9.9