Hello!
Is there a way creatinge a 3D heatplot using Plots.jl?
I try to visualize a 4D plot by plotting a 3D sphere and coloring the surface according to a function f.
This is the closest I was able to do:
plot(x,y,z, st=:surface)
but now I would like to set the colors on the surface by a function f(x,y,z) and not according to the height z.
Thank you for your help
You can use Plots.jl pyplot() or plotlyjs() backends to produce something like this:
Code example:
using Plots; plotlyjs() #or: pyplot()
n = 300
θ = LinRange(0,π,n)
ϕ = LinRange(0,2π,n)
xx = @. sin(θ)*cos(ϕ')
yy = @. sin(θ)*sin(ϕ')
zz = @. cos(θ)*ones(n)'
surface(xx, yy, zz, fill_z = 5*sin.(10xx .* yy), size=(600,600))
The user function needs to be mapped onto the meshgrid and then fill_z takes over to assign colors from the colormap.
Thank you a lot!
Let us know if you get a nice plot on the sphere that you can share.
It’s always fun to see what one can get by poking mathematical functions around:
Ex.1.1: Golden stripes-1
what function is this?
How about a little game to spice things up, inviting interested people to share examples without revealing the underlying mathematical function, say until Christmas? 
Bezier surface colormapped according to the green component values of a cat image.
A different camera eye position:
