我想做以下事情:
无意中将点添加到图中我点击以标记每个峰的存在。
ui.R
plotOutput("plot1", click = "plot_click")
server.R
output$plot1 <- renderPlot({
plot(x,y)
points(x=input$plot_click$x,y=input$plot_click$y)
})
这里的问题是,尽管'plot_click'机制识别了点的x和y位置 - 'points()'命令只会导致点暂时出现然后消失。
我也尝试过reactivePlot,但这返回了错误:
could not find function "func"
答案 0 :(得分:1)
对它进行排序。基于上一篇文章的帮助:avoid double refresh of plot in shiny
library(shiny)
ui <- basicPage(
actionButton("submit","submit"),
plotOutput("plot1", click = "plot_click"),
verbatimTextOutput("info"),
tableOutput('table')
)
server <- function(input, output) {
click_saved <- reactiveValues(singleclick = NULL)
observeEvent(eventExpr = input$plot_click, handlerExpr = { click_saved$singleclick <- input$plot_click })
rv=reactiveValues(m=data.frame(x=0,y=0))
output$plot1 <- renderPlot({
plot(x,y, type='l')
points(rv$m$x[-1],rv$m$y[-1])
})
output$info <- renderText({
paste0(unlist(click_saved$singleclick))
})
observeEvent(input$submit, {
if (input$submit > 0) {
rv$m <- rbind(rv$m,unlist(click_saved$singleclick))
}
})
output$table <- renderTable({
if (is.null(rv$m)) {return()}
print(rv$m)
}, 'include.rownames' = FALSE
, 'include.colnames' = TRUE
)
}
shinyApp(ui, server)