Gadfly,新的颜色/图层

时间:2016-11-12 14:43:44

标签: julia gadfly

当我将新图层推送到现有图表时,它会保持相同的颜色。有没有办法在将新图层推到绘图时自动更改颜色,或者至少是使用随机数设置颜色的方法(我事先不知道我将拥有多少层)?

y=[3, 7, 5, 1]
x=[1, 2, 3, 4]
xmin1 = x .- 0.1
xmax1 = x .+ 0.1

xmin2 = x .- 0.5
xmax2 = x .- 0.3

y=[3, 7, 5, 1]
x=[1, 2, 3, 4]
xmin1 = x .- 0.1
xmax1 = x .+ 0.1

xmin2 = x .- 0.5
xmax2 = x .- 0.3

p = plot(xmin=xmin1, xmax=xmax1, y=[3, 7, 5, 1], Geom.bar)

# The following creates a new layer that keeps the same color
push!(p, layer(xmin=xmin2, xmax=xmax2, y=[3, 7, 5, 1], Geom.bar )) 

# I do not want to use this because I don't know how many layers I will have
# push!(p, layer(xmin=xmin2, xmax=xmax2, y=[3, 7, 5, 1], Geom.bar, 
#    Theme(default_color=colorant"green") ))

1 个答案:

答案 0 :(得分:1)

一种可能的解决方案:

Using Colors
function gen_colors(n)
  cs = distinguishable_colors(n,
      [colorant"#FE4365", colorant"#eca25c"], # seed colors
      lchoices=Float64[58, 45, 72.5, 90],     # lightness choices
      transform=c -> deuteranopic(c, 0.1),    # color transform
      cchoices=Float64[20,40],                # chroma choices
      hchoices=[75,51,35,120,180,210,270,310] # hue choices
  )
end

mycolors = gen_colors(n)

在运行时,使用要在图中添加的图层数调用此函数,然后使用返回数组的元素作为default_color的参数。即,对于第i层使用

Theme(default_color=mycolors[i])