discrete colorer in 2D phase diagrams

[jdelpino]

Something in the lines of this snippet should do the trick

using Plots
gr()

# Sample data with discrete values
x = LinRange(-2, 2, 100)
y = LinRange(-2, 2, 100)
z = [round(xi^2 + yi^2) for xi in x, yi in y]  # Discrete values`

# Identify unique values in z
unique_vals = sort(unique(vec(z)))

# Plot with one level per unique value
heatmap(x, y, z;
    levels = length(unique_vals),
    clims = (minimum(unique_vals), maximum(unique_vals)),
    c = :viridis,
    colorbar = true,
    colorbar_ticks = (unique_vals, string.(unique_vals))  # Optional: label each tick
)

[oameye]

https://discourse.julialang.org/t/plots-jl-how-can-i-get-discrete-colors-in-the-colorbar-of-a-heatmap/29660

[oameye]

JuliaPlots/Plots.jl#5161