刻面尺寸增加的不同标记

Question

在我下面的示例代码中，我希望只对每个 Grade 和我选择的 size 使用不同的 marker 而不是 circle。现在 size 是基于 alphabet 的 sequence- 我想将它提升至少两个级别作为当前起始 size（从 Grade A) 太小了。

library(tidyverse)

DF1 = data.frame(Grade = c("A","B","C","D"), Fee = c(50, 100,80, 60), ST1 = c(0.5, 0.7, 0.67,0.60),
                 ST2 = c(0.48, 0.8, 0.697,0.77), ST3 = c(0.53, 0.58, 0.57,0.62), type = rep("Teenage",4))
DF2 = data.frame(Grade = c("A","B","C","D"), Fee = c(60, 120,90, 70), ST1 = c(0.55, 0.73, 0.65,0.70),
                 ST2 = c(0.58, 0.82, 0.73,0.75), ST3 = c(0.55, 0.52, 0.58,0.62), type = rep("Overage",4))

DFPlot_1 = gather(data = DF1, key = "Variable", value = "Value", -Fee, -Grade, -type)
DFPlot_2 = gather(data = DF2, key = "Variable", value = "Value", -Fee, -Grade, -type)

DF =rbind(DFPlot_1,DFPlot_2)
ggplot(data = DF, aes(x= Fee, color = Grade, size = Grade))+
  geom_point(aes(y = Value))+ facet_grid(type ~ Variable)

这是我在运行上述代码时得到的 Figure - 请参阅大小 (A is almost non-visibile)。我想增加尺寸，但从更高的级别开始。

Answer 1

如上所述您要使用 scale_size_manual。您有多种调整大小的方法（阅读文档），但适合您情况的示例是：

ggplot(data = DF, aes(x= Fee, color = Grade, size = Grade))+
  geom_point(aes(y = Value))+ facet_grid(type ~ Variable) + 
  scale_size_manual(values = c(4,5,6,7))

刻面尺寸增加的不同标记

Different marker with increasing size in faceting

size

r

ggplot2

marker

facet-grid