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我有一个闪亮的应用程序,允许我的用户浏览数据集。这个想法是,用户探索数据集,以及用户发现的任何有趣的事情,他将通过电子邮件与他的客户分享。我不知道用户会发现多少有趣的东西。所以,在每个表格或图表旁边,我有一个“将此项目添加到报告”按钮,该按钮将当前视图隔离并将其添加到reactiveValues列表中。现在基于闪亮的用户交互生成HTML报告
,我想要做的是以下几点:
- 环路穿过reactiveValues列表中的所有项目,
- 生成描述该项目的一些说明文字(本文最好格式化HTML /降价,而不是代码的注释)
- 显示项目
- 捕捉该环路作为H的输出TML
- 显示这个HTML中闪亮的预览
- 写这个的HTML文件
knitr似乎做的正是我想要的东西相反 - 在knitr让我添加交互闪亮成分在另一个静态文档中,我想根据用户创建的静态值生成光泽的HTML(可能使用knitr,我不知道)。
我已经在下面构建了一个最低限度不工作的示例,以表明我想要做什么。它不起作用,仅用于演示目的。
ui = shinyUI(fluidPage(
title = "Report generator",
sidebarLayout(
sidebarPanel(textInput("numberinput","Add a number", value = 5),
actionButton("addthischart", "Add the current chart to the report")),
mainPanel(plotOutput("numberplot"),
htmlOutput("report"))
)
))
server = shinyServer(function(input, output, session){
#ensure I can plot
library(ggplot2)
#make a holder for my stored data
values = reactiveValues()
values$Report = list()
#generate the plot
myplot = reactive({
df = data.frame(x = 1:input$numberinput, y = (1:input$numberinput)^2)
p = ggplot(df, aes(x = x, y = y)) + geom_line()
return(p)
})
#display the plot
output$numberplot = renderPlot(myplot())
# when the user clicks a button, add the current plot to the report
observeEvent(input$addthischart,{
chart = isolate(myplot)
isolate(values$Report <- c(values$Report,list(chart)))
})
#make the report
myreport = eventReactive(input$addthischart,{
reporthtml = character()
if(length(values$Report)>0){
for(i in 1:length(values$Report)){
explanatorytext = tags$h3(paste(" Now please direct your attention to plot number",i,"\n"))
chart = values$Report[[i]]()
theplot = HTML(chart) # this does not work - this is the crux of my question - what should i do here?
reporthtml = c(reporthtml, explanatorytext, theplot)
# ideally, at this point, the output would be an HTML file that includes some header text, as well as a plot
# I made this example to show what I hoped would work. Clearly, it does not work. I'm asking for advice on an alternative approach.
}
}
return(reporthtml)
})
# display the report
output$report = renderUI({
myreport()
})
})
runApp(list(ui = ui, server = server))
我得看看这个。我宁愿保留原始格式而不是保存为图像,以便例如用户可以将数据表复制粘贴到Excel中,但如果我无法使其工作,这是一个可行的替代方案。 – CPhil