我有一个从这样的数据帧创建的数据表:
output$main_temp <- renderDataTable(df[,-1:-1], width = "auto")
我想使用和不使用值进行着色。具有绿色的值但没有红色的值的单元格。
我尝试过:
output$main_temp <- renderDataTable({
datatable(df[,-1:-1], options = list(
columnDefs = list(list(targets = 6, visible = FALSE))
)) %>% formatStyle(
names(df[,-1:-1]),
backgroundColor = styleEqual(c(0, 1), c('gray', 'yellow'))
)
})
样本数据:
必填输出:
答案 0 :(得分:1)
styleEqual
映射其辩论对象一对一:
values:CSS值的向量
levels:要映射到(一对一)的数据值的字符向量 CSS值
因此您可以
df <- data.frame(cat = letters[1:5],
t1 = c(33, NA, 89, 45, NA),
t2 = c(NA, NA, 4, NA, 23),
t3 = c(56, NA, NA, 67, NA),
t4 = c(NA, NA, 12, 66, NA))
uval <- unique(df[!is.na(df)])
datatable(df) %>%
formatStyle(names(df)[-1],
backgroundColor = styleEqual(c(NA, uval),
c('red', rep('lightgreen', length(uval)))))
将每个值映射为相同的颜色。
另一种选择是使用JavaScript手动实现 :
library(shiny)
library(htmlwidgets)
js <- 'function(settings, json) {
// For every row, select all table cells starting at cell #3
$("#DataTables_Table_0 td:nth-child(3+1n)").each(function(key, val) {
if( $(this).html() == "") {
$(this).css("background-color", "#f00");
} else {
$(this).css("background-color", "#0f0");
};
});
}'
ui <- fluidPage(fluidRow(dataTableOutput("main_temp")))
server <- function(input, output) {
df <- data.frame(cat = letters[1:5],
t1 = c(33, NA, 89, 45, NA),
t2 = c(NA, NA, 4, NA, 23),
t3 = c(56, NA, NA, 67, NA),
t4 = c(NA, NA, 12, 66, NA))
// when the table has finished loading, execute the JS code
output$main_temp <- renderDataTable(df, options = list(initComplete = JS(js)))
}
shinyApp(ui = ui, server = server)