引用ggplot图层中的管道数据集以进行子设置 [英] Referencing piped dataset in ggplot layers for subsetting

问题描述

试图找到一种方法来引用不同ggplot2 geom图层的数据集的不同部分，而不必先在全局环境中保存数据集。

Trying to find a way to reference different parts of the dataset for different ggplot2 geom layers without having to save the dataset first in the global environment.

Ex不起作用

read_excel("Book1.xlsx",sheet = "Sheet2") %>% 
  ggplot(aes(x,y)) +
  geom_col() +
  geom_point(data=subset($ID == "1"),colour="red")

以上似乎没有用，因为我没有以R可以识别的方式引用管道（magrittr）数据集。我已经搜索过，但是唯一能看到的解决方案是基于这样的解决方案：首先将数据集保存在全球环境中

Above does not seem to work since i am not referencing the piped(magrittr) dataset in a way that R can recognize it. I have searched but the only solutions i could see are based of the one where i first save the dataset in the global environment as such

先保存数据集的工作解决方案。

Ex working solution with saving the dataset first.

df <- read_excel("Book1.xlsx",sheet = "Sheet2")

  ggplot(df,aes(x,y)) +
  geom_col() +
  geom_point(data=subset(df,ID == "1"),colour="red")

推荐答案

您可以尝试使用 dplyr ：

library(dplyr)
library(ggplot2)

read_excel("Book1.xlsx",sheet = "Sheet2") %>% 
  ggplot(aes(x, y)) +
  geom_col() +
  geom_point(data = . %>% filter(ID == "1"), colour = "red")

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