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我设法使用灰度命令制作了一个 3D 散点图，其中第三维表示颜色渐变。不过，当我试图产生与之相吻合的传说时，我碰壁了。我已经有了我想要的颜色范围，我只是不知道如何告诉 R 将它们变成图例。这是我的代码。

conocarp.stands<-c(264,330,400,594,600,700,726,730,800,825,825,826,1914,2145,2200,2310,2475,2640,3630,3960,3960,4124,4554,5082,8250,8475,9200,1000)

fimb.size<-c(540,2160,1100,1170,350,850,2340,600,200,738,1080,1300,2416,540,3565,810,648,0,900,0,635,1210,0,900,2340,1152,0,0)

sugar.visits.cono<-c(0.005682,0,0.065,0,0,0.010714,0,0.010274,0.011875,0,0,0,0,0,0.007045,0,0.001414,0.002273,0,0.014141,0.001263,0.006426,0.000769,0.000295,0.005515,0.000186,0.00359,0.004939)

colors <- rev(grey(1:101/101))
zcolor <- colors[round((sugar.visits.cono -min(sugar.visits.cono))/diff(range(sugar.visits.cono))*100 + 1)]
plot(conocarp.stands,fimb.size, pch=1, cex=1.8,ann=FALSE)
points(conocarp.stands,fimb.size,col=zcolor, pch=16, cex=1.5)

zcolor 是我的 z 轴值，应该可以用来生成我的图例。我曾尝试使用各种软件包，即 SDMTools 和字段，但我不应该这样做。

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2 回答 2

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试试这个，

library(ggplot2)

d = data.frame(conocarp.stands = conocarp.stands,
               fimb.size = fimb.size,
               sugar.visits.cono = sugar.visits.cono)

ggplot(data = d, mapping = aes(x = conocarp.stands, y = fimb.size)) +
     geom_point(aes(colour = sugar.visits.cono), shape = 19)

last_plot() + scale_colour_gradient(high="grey10", low="grey90") + theme_bw()
于 2012-11-21T08:50:58.973 回答
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使用 raster.grid 命令我发现你也可以解决这个问题，但是我不知道如何标记轴。非常感谢巴蒂斯特，我一直在避免使用 ggplots 2 包，但我认为是时候深入研究了。如果对任何人有帮助，这是我使用 raster.grid 的代码：

库（网格）grid.raster（1：101/101，宽度=.075，高度=.1）

于 2012-11-21T12:32:32.037 回答