自己的颜色范围的Sankey图与networkD3包在R

Question

我试图在networkD3包中使用sankeyNetwork()绘制Sankey图。

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。有没有可能改变SankeyNetwork的颜色?我只需要一个范围，例如3种颜色，我可以自己设置(不是d3.scale的预定义的colorscales)。

Answer 1

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

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

使用自定义颜色时是否有办法设置透明度?

"# AARRGGBB"似乎行不通

你可以创建一个selectAll("your_class").style("opacity"，0.5)，看看这个:stackoverflow.com/questions/6042550/…CSS3有一个完全标准化的解决方案:"fill="rgba(124,240,10,0.5)"

有关颜色参考，请查看此处:http://bl.ocks.org/aaizemberg/78bd3dade9593896a59d

和这里:https://github.com/mbostock/d3/wiki/Ordinal-Scales#categorical-colors