R ggiraph - 运行 .R 文件时没有绘图 [英] R ggiraph - no plot when running .R file

问题描述

如何在执行 .R 文件时获取图形?文件 (test.r) 如下所示:

How do I get the graph when executing a .R file? The file (test.r) looks like this:

library(ggplot2)
library(ggiraph)
gg <- ggplot(data = mtcars, aes(x = mpg, y = wt, color = factor(cyl)))
gg1 <-  gg + geom_point_interactive(aes(tooltip = gear), size = 5)
ggiraph(code = print(gg1))

我用这个命令运行它:

R < test.R --no-save

但是什么也没发生.如果我只是从命令行运行 R 并逐行输入代码，Firefox 将打开并显示一个非常漂亮的图形，其中显示了想要的鼠标悬停标签.

But nothing happens. If I just run R from the command line and enter the code line-by-line Firefox opens and shows a really nice graph with the wanted mouse-over label showing.

R version 3.2.3 (2015-12-10)
x86_64-pc-linux-gnu

推荐答案

R 生成一个临时 .html 文件，然后生成一个 gvfs-open 进程来查看该文件(这又会打开 Firefox).当您从命令行运行脚本时，R 会在 Firefox 进程有机会完全加载之前退出并清理其临时文件.您可以通过执行此操作来查看此效果

R generates a temporary .html file and then spawns a gvfs-open process to view that file (which in turn opens Firefox). When you are running your script from the command line, R exits and cleans up its temporary files before Firefox process has a chance to fully load. You can see this in effect by doing

$ R -q --interactive < test.R
> library(ggplot2)
> library(ggiraph)
> gg <- ggplot(data = mtcars, aes(x = mpg, y = wt, color = factor(cyl)))
> gg1 <-  gg + geom_point_interactive(aes(tooltip = gear), size = 5)
> ggiraph(code = print(gg1))
Save workspace image? [y/n/c]: 
gvfs-open: /tmp/RtmpPxtiZi/viewhtml3814550ff070/index.html: error opening location:
Error when getting information for file '/tmp/RtmpPxtiZi/viewhtml3814550ff070/index.html': No such file or directory

一个简单的解决方法是在脚本末尾添加 Sys.sleep(5).这会暂停 R 几秒钟，允许 gvfs-open 进程在 R 退出并清理之前完成在浏览器窗口中打开临时文件自己起来.

A simple fix is to add Sys.sleep(5) at the end of your script. This pauses R for a few seconds, allowing gvfs-open process to finish opening your temporary file in a browser window, before R exits and cleans up after itself.

注意 R 在 Sys.sleep() 之后退出时仍会删除临时的 index.html 文件，但 Firefox 已经在内存中有缓存.

Note that R will still remove the temporary index.html file when it exits after Sys.sleep(), but Firefox will already have a cache in memory.

另一种解决方案是将您的交互式绘图明确写出到一个 .html 文件中，该文件在 R 退出后仍然存在.您可以通过将 ggiraph 的结果存储到一个变量然后将其传递给 htmlwidgets::saveWidget 来实现:

An alternative solution is to explicitly write out your interactive plot to an .html file that persists after R exits. You can do this by storing the result of ggiraph to a variable and then passing that to htmlwidgets::saveWidget:

myplot <- ggiraph(code = print(gg1))
htmlwidgets::saveWidget( myplot, "test.html" )
browseURL( "test.html" )

这篇关于R ggiraph - 运行 .R 文件时没有绘图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！