r - 线框:具有多个表面和透明度的图例颜色

Question

以下代码使用格子的线框函数绘制了 3 个彩色平面。但是，我不明白为什么设置颜色组不会改变图例。我尝试手动执行此操作，但最终只更改了文本颜色。顺便说一句，有没有人也知道如何使表面透明70％？

library(lattice)
library(akima)

SurfaceData <- data.frame(
               x=rep(seq(0,100,length.out=10),each=10,times=3),
               y=rep(rep(seq(0,100,length.out=10),times=10),times=3),
               z=c(rep(25,100),seq(30,70,length.out=100),seq(95,75,length.out=100)),
               type=factor(rep(c("A","B","C"),each=100))
                          )

wireframe(z~x*y,data=SurfaceData,group=type,
          col.groups=c("red","green","blue"),
          scales = list(arrows=FALSE, col="black",font=10),
          xlab = list("Variable X",rot=30),
          ylab = list("Variable Y",rot=-30),
          zlab = list("Variable Z",rot=90),
          zlim = c(0,100),
          #auto.key=TRUE,
          auto.key=list(text=c("A","B","C"),col=c("red","green","blue"),lines=TRUE),
          par.settings = list(axis.line = list(col = "transparent")),
          )

结果:



谢谢!

Answer 1

要改变线条的颜色，你应该替换 auto.key与 key并提供文本和行的值列表。

wireframe(z~x*y,data=SurfaceData,group=type,
          col.groups=c("red","green","blue"),
          scales = list(arrows=FALSE, col="black",font=10),
          xlab = list("Variable X",rot=30),
          ylab = list("Variable Y",rot=-30),
          zlab = list("Variable Z",rot=90),
          zlim = c(0,100),
          key=list(text=list(c("A","B","C"),col=c("red","green","blue")),
                   lines=list(lty=c(1,1,1),col=c("red","green","blue"))),
          par.settings = list(axis.line = list(col = "transparent")),
)

要使颜色透明，您可以使用函数 rgb() .这里我定义了新变量 mycolors.trans包含透明颜色和 mycolors具有相同的颜色，但对于图例条目不透明。

mycolors.trans = rgb(c(255,0,0), 
               c(0,255,0), 
               c(0,0,255),alpha = 70,maxColorValue = 255) 

mycolors = rgb(c(255,0,0), 
                     c(0,255,0), 
                     c(0,0,255),maxColorValue = 255) 

wireframe(z~x*y,data=SurfaceData,group=type,
          col.groups=mycolors.trans,
          scales = list(arrows=FALSE, col="black",font=10),
          xlab = list("Variable X",rot=30),
          ylab = list("Variable Y",rot=-30),
          zlab = list("Variable Z",rot=90),
          zlim = c(0,100),
          #auto.key=TRUE,
          key=list(text=list(c("A","B","C"),col=mycolors),
                   lines=list(lty=c(1,1,1),col=mycolors)),
          par.settings = list(axis.line = list(col = "transparent")),
)