Question

这是我现在的饼图：

library(plotly)
library(RColorBrewer)


P <- data.frame (labels = c("A", "B", "C", "D", "E"),
             values = c(5, 8, 3, 4, 9))

plot_ly(P, labels = labels, values = values, type = "pie",
    marker = list(colors=c("lightskyblue", "deepblue", "dodgerblue", "midnightblue", "powderblue")),
    textinfo="value",
    textposition="outside")

我想用十六进制字符串改变颜色，所以我可以使用来自RColorBrewer的调色板。提前谢谢！

Answer 1

只需将十六进制值放入字符串中，然后使用哈希（井号）plot_ly(P, labels = labels, values = values, type = "pie", marker = list(colors=c("#556677", "#AA3344", "#772200", "#11AA22", "#AA231B88")), # the last color has alpha value set. textinfo="value", textposition="outside")。十六进制的前两位数字表示红色，下一页表示绿色，2位数表示蓝色（#RRGGBB）。您可以选择为alpha（透明度）添加两位数（#RRGGBBAA）。

e.g

modBaseAddr

Answer 2

探索RColorBrewer包

   library(RColorBrewer)

查看RColorBrewer包中的函数列表

   ls("package:RColorBrewer")
   #  [1] "brewer.pal"         "brewer.pal.info"    "display.brewer.all"
   #  [4] "display.brewer.pal"

显示所有配色方案

   display.brewer.all()

获取Blues十六进制字符串

   brewer.pal(9,"Blues")
   # [1] "#F7FBFF" "#DEEBF7" "#C6DBEF" "#9ECAE1" "#6BAED6" "#4292C6" "#2171B5"
   # [8] "#08519C" "#08306B"

   brewer.pal(10,"Blues")
   # [1] "#F7FBFF" "#DEEBF7" "#C6DBEF" "#9ECAE1" "#6BAED6" "#4292C6" "#2171B5"
   # [8] "#08519C" "#08306B"
   # Warning message:
   # In brewer.pal(10, "Blues") :
   # n too large, allowed maximum for palette Blues is 9
   # Returning the palette you asked for with that many colors

观看布鲁斯舞团

  display.brewer.pal(9,"Blues")

您可以获得的颜色数量有限制，但如果您想扩展Sequential或Diverging组，可以使用colorRampPalatte命令进行扩展，例如：

  colorRampPalette(brewer.pal(9,”Blues”))(100)

divergent，qualitative和sequential计划的示例。 Spectral，Set2，Reds，可以使用上面提到的命令display.brewer.all()查看这些名称。您可以使用列表中的其他一些方案。

 display.brewer.pal(4,"Spectral")
 brewer.pal(4,"Spectral")
 # [1] "#D7191C" "#FDAE61" "#ABDDA4" "#2B83BA"

 display.brewer.pal(4,"Set2")
 brewer.pal(4,"Set2")
 # [1] "#66C2A5" "#FC8D62" "#8DA0CB" "#E78AC3"

 display.brewer.pal(4,"Reds")
 brewer.pal(4,"Reds")
 # [1] "#FEE5D9" "#FCAE91" "#FB6A4A" "#CB181D"

如何使用十六进制字符串在曲线图中更改饼图中切片的颜色？

2 个答案: