Add functions which make saving cgrad as CSV a little easier

Project.toml

@@ -6,6 +6,7 @@ version = "1.3.4"
 ColorSchemes = "35d6a980-a343-548e-a6ea-1d62b119f2f4"
 Colors = "5ae59095-9a9b-59fe-a467-6f913c188581"
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
+DelimitedFiles = "8bb1440f-4735-579b-a4ab-409b98df4dab"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"

src/PlotUtils.jl

@@ -3,6 +3,7 @@ module PlotUtils
 using SnoopPrecompile
 using ColorSchemes
 using Reexport
+using DelimitedFiles
 using Printf
 using Dates
 

src/color_utils.jl

@@ -35,6 +35,28 @@ function generate_colorscheme(
     ColorScheme(colors)
 end
 
+# --------------------------------------------------------------
+# Methods to save colorschemes to CSV
+function cgrad_to_csv(file::AbstractString, cgrad::ColorGradient)
+    values = cgrad.values
+    colors = cgrad.colors.colors
+
+    reds = Colors.red.(colors)
+    greens = Colors.green.(colors)
+    blues = Colors.blue.(colors)
+    alphas = Colors.alpha.(colors)
+
+    csv_matrix = hcat(values, reds, greens, blues, alphas)
+    csv_matrix_with_headers = vcat(["Value" "Red" "Green" "Blue" "Alpha"], csv_matrix)
+
+    DelimitedFiles.writedlm(file, csv_matrix_with_headers, ',')
+end
+
+function csv_to_cgrad(file::AbstractString)
+    data_cells, header_cells = DelimitedFiles.readdlm(file, ',', Float64, '\n'; header = true)
+    return cgrad(RGBA{Float64}.(data_cells[:, 2], data_cells[:, 3], data_cells[:, 4], data_cells[:, 5]), data_cells[:, 1])
+end
+
 # ----------------------------------------------------------------------------------
 
 function getpctrange(n::Integer)