我希望在shiny DT中包含sparklines。在RStudio Viewer中它可以正常显示,但在Shiny中却无法渲染。以下是一个最小化的示例。
# dependencies
require(sparkline)
require(DT)
require(shiny)
# create data with sparklines
spark_data <- data.frame(
id = c('spark1', 'spark2'),
spark = c(
spk_chr(values = 1:3, elementId = 'spark1'),
spk_chr(values = 3:1, elementId = 'spark2')
)
)
# render in RStudio viewer (this works)
tbl <- datatable(spark_data, escape = FALSE)
spk_add_deps(tbl)
# render in Shiny (no sparklines rendered in DT)
ui <- fluidPage(
sparklineOutput("test_spark"),
dataTableOutput("tbl")
)
server <- function(input, output) {
# sparkline outside DT (works fine) - also ensures sparkline dependencies are attached
output$test_spark <- renderSparkline(sparkline(1:3))
# sparkline inside DT (does not render)
output$tbl <- renderDataTable(
expr = spark_data,
escape = FALSE
)
}
shinyApp(ui = ui, server = server)