gt table 中多列的条件格式

Question

这是我的第一个 post，如果我搞砸了，请见谅。我正在尝试将条件格式应用于 gt table 的多个列（将样本 SampA、SampB 和 SampB 的结果与 Limit 进行比较）。在 gt examples and a different 之一的带领下，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))

但是，我没有成功地尝试将其扩展到多列。我可以获得与 'vars(SampA,SampB,SampC)' 一起使用的 'columns' 参数。将 'rows' 参数保留为 'SampA >= Limit'，格式 'works' 意味着所有 SampA >= Limit 的行都在三个 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
        )

我已经能够通过重复为每一列量身定制的 'style_tab()' 来“暴力破解”我想要的东西，但我知道必须有更好的方法来实现我的目标。帮忙？

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))

Answer 2

我知道这可能为时已晚，无法为您提供帮助，但我能够通过定义一个函数来解决这个问题，该函数使用正确的参数创建一个 cells_body 调用列表。然后将此列表传递给 locations 参数并将指定的格式应用于所有选定的单元格。希望其他人觉得这很有用！

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")))

 builder <- function(x, Limit){cells_body(columns = !!sym(x), rows = !!sym(x) > Limit)}

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

这将适用于与您的列名称匹配的任何字符串向量，包括可以通过 colnames() 函数创建的内容

names <- colnames(samples)[3:ncol(samples)]

gt(samples,rowname_col="Chem") %>% 
  tab_style(style = list(cell_fill(color = "grey80"), cell_text(weight = "bold")),
            locations = lapply(names, builder, Limit = sym(Limit))) %>%
  tab_spanner(label = "Samples", columns = c(SampA, SampB, SampC))

gt table 中多列的条件格式

Conditional formatting of multiple columns in gt table

r

gt