R中带有networkD3包的Sankey图的自有颜色范围 [英] Own colour range for Sankey Diagram with networkD3 package in R

问题描述

我正在尝试使用networkD3软件包中的sankeyNetwork()绘制Sankey图.

I am trying to plot Sankey diagrams using sankeyNetwork() in networkD3 package.

sankeyNetwork(Links = Flow_data, Nodes = Nodes_data,
    Source = "Source_ID", Target = "Target",
    Value = "value", NodeID = "Nodes_name",
    width = 1000, height=600, fontsize = 16, nodeWidth = 50,
    colourScale = "d3.scale.category20c()")

可视化效果很好，但我想将颜色范围更改为单个范围.有没有机会改变SankeyNetwork的颜色?我只需要一个范围我可以自行设置3种颜色(不是d3.scale的预定义colourScales).

The visualization works great but I would like to change the colour range to an individual range. Is there any chance to change the colours of the SankeyNetwork? I need a range of only e.g. 3 colours which I can set by myself (not the predefined colourScales of d3.scale).

推荐答案

您可以配置:

sankeyNetwork(Links = Flow_data, Nodes = Nodes_data,
                      Source = "Source_ID", Target = "Target",
                      Value = "value", NodeID = "Nodes_name",
                      width = 1000, height=600, fontsize = 16, nodeWidth = 50,
                      colourScale = "d3.scale.category20c()")  <==== Categorical color

更新

较新版本:

d3.scale.ordinal().range(["#7d3945","#e0677b", "#244457"])
now works if changed to:
d3.scaleOrdinal().range(["#7d3945","#e0677b", "#244457"]) 

感谢@Peter Ellis

Thanks @Peter Ellis

更新

使用自定义颜色时是否可以设置透明度?

Is there any way to set transparency when using custom colours?

#AARRGGBB"似乎不起作用

"#AARRGGBB" doesn't seem to work

您可以创建一个selectAll("your_class").style("opacity"，0.5)，请看一下:

You can make a selectAll("your_class").style("opacity",0.5), Take a look to this: stackoverflow.com/questions/6042550/… for style attribute options. And CSS3 has a fully standardized solution: "fill="rgba(124,240,10,0.5)"

有关颜色参考，请参见此处: http://bl.ocks.org/aaizemberg/78bd3dade9593896a59d

For color references, look here: http://bl.ocks.org/aaizemberg/78bd3dade9593896a59d

和此处: https://github.com/mbostock/d3/wiki/Ordinal-Scales#categorical-colors

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