r-呈现带有标题/标题和预先选择的行的闪亮数据表

Question

我正在尝试为绘制xy数据编写一个shiny app。每个xy点都与几个因素有关：

set.seed(1)
data.df <- data.frame(x = rnorm(1000), y = rnorm(1000),
sex = sample(c("F", "M"), 1000, replace = T),
age = sample(c("Y", "O"), 1000, replace = T),
group = sample(c("A", "B", "C", "D"), 1000, replace = T),
stringsAsFactors = F)
design.df <- data.frame(factor.name = c(c(rep("sex",2), rep("age",2), rep("group",4))),
factor.levels = c("F", "M","Y", "O","A", "B", "C", "D"), stringsAsFactors = F)

我想使用server中的renderUI内的DT::renderDT，使用户能够基于对来自design.df的多行的选择来对xy数据(data.df(进行子集化，其中默认选择是design.df的所有行。使用以下代码可以很好地工作：

suppressPackageStartupMessages(library(dplyr))
suppressPackageStartupMessages(library(shiny))
suppressPackageStartupMessages(library(DT))
server <- function(input, output)
{
output$design.idx <- renderUI({
output$design.df <- DT::renderDT(design.df, server = TRUE, selection = list(mode = "multiple", selected = rownames(design.df)[1:nrow(design.df)]))
DT::dataTableOutput("design.df")
})
xy.plot <- reactive({
if(!is.null(input$design.df_rows_selected)){
selected.design.df <- design.df[input$design.df_rows_selected,,drop = FALSE]
selected.idx <- lapply(unique(selected.design.df$factor.name), function(f) which(data.df[,f] %in% dplyr::filter(selected.design.df, factor.name == f)$factor.levels)) %>%
unlist() %>% unique()
plot.df <- data.df[selected.idx,,drop=F]
xy.plot <- suppressWarnings(plotly::plot_ly(marker = list(size = 3), type = 'scatter', mode = "markers", x = plot.df$x, y = plot.df$y, showlegend = FALSE) %>%
plotly::layout(xaxis = list(zeroline = FALSE, showticklabels = FALSE, showgrid = FALSE), yaxis = list(zeroline = FALSE, showticklabels = FALSE, showgrid = FALSE)))
} else{
xy.plot <- NULL
}
return(xy.plot)
})
output$outPlot <- plotly::renderPlotly({
xy.plot()
})
}

ui <- fluidPage(
titlePanel("Results Explorer"),
sidebarLayout(
sidebarPanel(
uiOutput("design.idx")
),
mainPanel(
plotly::plotlyOutput("outPlot")
)
)
)
shinyApp(ui = ui, server = server)

但我也想为渲染的datatable提供一个标题或说明，所以我尝试替换：

output$design.df <- DT::renderDT(design.df, server = TRUE, selection = list(mode = "multiple", selected = rownames(design.df)[1:nrow(design.df)]))

带有：

output$design.df <- DT::renderDT(datatable(design.df, caption = "Subset Selection"), server = TRUE, selection = list(mode = "multiple", selected = rownames(design.df)[1:nrow(design.df)]))

在这种情况下，CCD_ 12参数似乎被忽略，并且默认选择为无行。将selected = rownames(design.df)[1:nrow(design.df)]更改为selected = 1:nrow(design.df)没有区别。

知道如何将渲染表的标题或标题与所有行一起作为预选默认值吗？

Answer 1

您必须在datatable对象中进行选择：

output$design.df <- DT::renderDT(
datatable(design.df, 
caption = "Subset Selection",  
selection = list(mode = "multiple",  
selected = rownames(design.df)[1:nrow(design.df)])
), 
server = TRUE)