在R语言formattable包中，如何将total行设置为加粗且字号为8？

你可以通过在formatter的style参数中加入条件判断，针对category列的total值单独设置加粗和字号样式。修改后的代码如下：

library(formattable)
df <- data.frame(category=c('a','b','total'),value=c(1,2,3))
formattable(df,list(
  category = formatter("span",
                       style = x ~ style(
                         color = "red",
                         font.weight = ifelse(x == "total", "bold", "normal"),
                         font.size = ifelse(x == "total", "8px", "inherit")
                       )
                       ),
  # 若需同步设置value列的total行样式，可添加以下配置
  value = formatter("span",
                    style = x ~ style(
                      font.weight = ifelse(df$category == "total", "bold", "normal"),
                      font.size = ifelse(df$category == "total", "8px", "inherit")
                    )
                    )
))

关键说明： #

• 借助ifelse()判断当前值是否为total，对目标行应用font.weight = "bold"实现加粗，font.size = "8px"设置字号；
• 非total行可设置font.weight = "normal"（默认字重）和font.size = "inherit"（继承默认字号），也可根据需求调整为其他样式；
• 若要让value列的total行同步样式，需单独为该列配置formatter，通过df$category匹配行条件。

内容的提问来源于stack exchange，提问作者anderwyang