由于关于 Rplots.pdf 的错误，R Shiny 应用程序无法在服务器上启动
R Shiny app fails to start on server due to error about Rplots.pdf
Shiny 应用 运行 在 RStudio 上运行良好，但在 public 服务器上 运行 运行不正常，而是抛出此错误：
Error in (function (file = if (onefile) "Rplots.pdf" else "Rplot%03d.pdf", :
cannot open file 'Rplots.pdf'
Calls: runApp ... ..stacktraceon.. -> <Anonymous> -> par -> <Anonymous>
Execution halted
出现此错误是因为您的应用程序中有代码试图在非交互式 R 会话（通常为 server.r 或 global.r）中生成绘图。
引用谢一辉的话：
From my experience, this is often an indication that your have some
code that generates plots in a non-interactive R session, and the
default graphics device for a non-interactive R session is pdf(). R
tried to capture the plot and writes Rplots.pdf, but failed probably
due to the fact that you don't have write permission to the working
directory. Your server.R contains a call to palette(), which I
believe will trigger Rplots.pdf. You can try to move it inside
renderPlot({}) and see if the problem goes away.
在我的例子中，这是在我的 global.r 文件中对 scales::show_col() 的剩余调用，来自测试一些调色板。
Shiny 应用 运行 在 RStudio 上运行良好，但在 public 服务器上 运行 运行不正常，而是抛出此错误：
Error in (function (file = if (onefile) "Rplots.pdf" else "Rplot%03d.pdf", :
cannot open file 'Rplots.pdf'
Calls: runApp ... ..stacktraceon.. -> <Anonymous> -> par -> <Anonymous>
Execution halted
出现此错误是因为您的应用程序中有代码试图在非交互式 R 会话（通常为 server.r 或 global.r）中生成绘图。 引用谢一辉的话：
From my experience, this is often an indication that your have some code that generates plots in a non-interactive R session, and the default graphics device for a non-interactive R session is pdf(). R tried to capture the plot and writes Rplots.pdf, but failed probably due to the fact that you don't have write permission to the working directory. Your server.R contains a call to palette(), which I believe will trigger Rplots.pdf. You can try to move it inside renderPlot({}) and see if the problem goes away.
在我的例子中，这是在我的 global.r 文件中对 scales::show_col() 的剩余调用，来自测试一些调色板。