R 使用 kableExtra 为单元格着色并使用嵌套的 if/ifelse 保持条纹格式？

Question

此问题的扩展：R wanting to limit the amount of digits from csv file

我正在使用 kableExtra 和 cell_spec 使用嵌套的 ifelse 语句为单元格着色。

我不想将小于 0.10 白色的值着色，而是不理会它们，以允许 kableExtra 应用条纹格式。

我觉得这是不可能的，因为背景颜色是如何应用的？

DF：

DF <- data.frame(V1 = sample(letters,10,T), V2 = abs(rnorm(10)), V3 = abs(rnorm(10)))

代码：

library(magrittr)
library(kableExtra)
paint <- function(x) {
  ifelse(x < 0.1, "white", ifelse(x < 0.2, "yellow", "red"))
}

DF[, -1] = lapply(DF[, -1], formatC, format = 'f', flag='0', digits = 2)
DF[,-1] = lapply(DF[,-1], function(x) cell_spec(x, background = paint(x), format = "latex"))

DF %<>%
  mutate_if(is.numeric, function(x) {
   cell_spec(x, background = paint(x), format = "latex") 
  })

kable(DF, caption = "colorized table with striping", digits = 2, format = "latex", booktabs = T, escape = F, longtable = T)%>%
  kable_styling(latex_options = c("striped", "hold_position", "repeat_header", font_size = 6))%>%
  landscape()%>%
  row_spec(0, angle = 45)

问题区域？

paint <- function(x) {
      ifelse(x < 0.1, "white", ifelse(x < 0.2, "yellow", "red"))
    }

是否可以将其更改为仅在黄色（>=.10<.2>=.2）之间更改颜色？还是必须定义所有条件？

所需的输出：一个条带表，仅突出显示定义的值，允许条带存在于小于 0.10 的值上

Answer 1

您无需对希望保留的单元格应用任何格式。因此，只需在调用 cell_spec 之前测试该条件（即，仅对要格式化的单元格调用 cell_spec）：

paint <- function(x) ifelse(x < 0.2, "yellow", "red")

DF[,-1] = lapply(DF[,-1], formatC, format = 'f', digits = 2)
DF[,-1] = lapply(DF[,-1], function(x) 
  ifelse(x < 0.1, x, cell_spec(x, background = paint(x), format = "latex")))

kable(DF, caption = "Highlighted numbers near zero", 
  digits = 2, format = "latex", booktabs = T, escape = F, longtable = T) %>%
  kable_styling(latex_options = c("striped", "hold_position", 
    "repeat_header", font_size = 6)) %>%
  landscape() %>%
  row_spec(0, angle = 45)