在ggplot2中使用`facet_grid`时，突出显示/在某些图周围画一个框 [英] Highlight / Draw a box around some of the plots when using `facet_grid` in ggplot2

问题描述

我正在创建类似的图矩阵

  ggplot(mpg，aes(displ，hwy))+ geom_point()+ facet_grid(rows = vars(cyl)，cols = vars(drv)) 

现在，我想以某种方式突出显示一些单独的图，比如说 cyl 是5或6，而 drv 是f .因此，理想情况下，它可能看起来像这样:

但是我也可以通过将 ggtheme 设置为经典或类似外观来使这些面板具有不同的外观.

但是，我还不清楚如何修改通过 facet_grid

生成的图矩阵中的各个选定图

解决方案

从@joran答案中找到

I am creating a matrix of plots similar to

ggplot(mpg, aes(displ, hwy)) + geom_point() + facet_grid(rows = vars(cyl), cols = vars(drv))

Now, I would like to have some way to highlight some of the individual plots, say the ones where cyl is 5 or 6, and drv is f. So, ideally, this might look like this:

But I would also be happy with those panels having a different look by setting ggtheme to classic or similar.

However, it is very unclear to me how I can modify individually selected plots within a matrix of plots generated via facet_grid

解决方案

From @joran answer found here, this is what I get :

[EDIT] code edited to select multiple facets

    if(!require(tidyverse)){install.packages("tidyverse")}
    library(tidyverse)

    #dummy dataset

    df = data.frame(type = as.character(c("a", "b", "c", "d")),
                    id = as.character(c("M5", "G5", "A7", "S3")),
                    val = runif(4, min = 1, max = 10),
                    temp = runif(4))

    # use a rectangle to individually select plots
ggplot(data = df, aes(x = val, y = temp)) + 
  geom_point() +
  geom_rect(data = subset(df, type %in% c("b", "c") & id %in% c("A7","G5")), 
                          fill = NA, colour = "red", xmin = -Inf,xmax = Inf,
            ymin = -Inf,ymax = Inf) +
  facet_grid(type~id)

It does not use theme() but it seems simple enough to highlight some facets.

这篇关于在ggplot2中使用`facet_grid`时，突出显示/在某些图周围画一个框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！