r - gt表中多列的条件格式

Question

这是我的第一篇文章，所以如果我搞砸了，请道歉。我正在尝试将条件格式应用于 gt 表的多列(比较样本 SampA、SampB 和 SampB 的结果以限制)。跟随其中一位gt examples的领头羊和一个不同的 stack overflow Q ，我设法使用以下代码将其应用于单个列(变量):

## Conditional Formatting of single column in gt table

samples = as_tibble(cbind("Chem"=c("Cd","Pb","Zn"),
                       "Limit"=c("0.005","0.05","0.007"),
                       "SampA" = c("0.001","0.15","0.003"),
                       "SampB" = c("0.002","0.04","0.005"),
                       "SampC" = c("0.009","0.23","0.03")))

gt(samples,rowname_col="Chem") %>% tab_style(
        style = list(
                cell_fill(color = "grey80"),
                cell_text(weight = "bold")
        ),
        locations = cells_body(
                columns = vars(SampA),
                rows = SampA >= Limit
        )
    )   %>% tab_spanner(
            label = "Samples",
            columns = vars(SampA,SampB,SampC))

Successful conditional formatting for single column

但是，我没有成功尝试将其扩展到多个列。我可以得到 'columns' 参数来处理 'vars(SampA,SampB,SampC)'。将 'rows' 参数保留为 'SampA >= Limit'，格式“有效”，因为 SampA >= Limit 的所有行都在三个 Samp 列中突出显示，但这不是我想要的。运行下面的代码最终没有任何列的格式。

        locations = cells_body(
                columns = vars(SampA,SampB,SampC),
                rows = vars(SampA,SampB,SampC) >= Limit
        )

Unsuccessful multiple column conditional formatting

通过重复为每一列量身定制的“style_tab()”，我已经能够“蛮力”我所追求的，但我知道必须有更好的方法来实现我的目标。帮助？

gt conditional formatting success by brute force.

Answer 1

library(gt)
samples = as_tibble(cbind("Chem"=c("Cd","Pb","Zn"),
                          "Limit"=c("0.005","0.05","0.007"),
                          "SampA" = c("0.001","0.15","0.003"),
                          "SampB" = c("0.002","0.04","0.005"),
                          "SampC" = c("0.009","0.23","0.03")))

samples <- samples %>% 
  mutate(Limit = as.numeric(Limit))

gt(samples,
   rowname_col="Chem") %>% 
  tab_style(style = list(cell_fill(color = 'yellow'), 
                         cell_text(weight = 'bold')), 
            locations = cells_body(columns=vars(SampA), 
                                   rows = SampA >= Limit)) %>% 
  tab_style(style = list(cell_fill(color = 'yellow'), 
                         cell_text(weight = 'bold')), 
            locations = cells_body(columns=vars(SampB), 
                                   rows = SampB >= Limit)) %>% 
  tab_style(style = list(cell_fill(color = 'yellow'), 
                         cell_text(weight = 'bold')), 
            locations = cells_body(columns=vars(SampC), 
                                   rows = SampC >= Limit)) %>% 
  tab_spanner(
  label = "Samples",
  columns = vars(SampA,SampB,SampC))