如何使 dplyr 中的连接操作静音? [英] How to make join operations in dplyr silent?

问题描述

dplyr (version 0.4.1) 打印它执行连接的列名.是否可以关闭此选项?

dplyr (version 0.4.1) prints the colnames by which it is performing the join. Is it possible to turn this option off?

R 代码:

library(dplyr)
a=data.frame(x=1,y=2)
b=data.frame(x=1,z=10)
aa=inner_join(a,b)

对于最后一行，dplyr 打印:

for the last line, dplyr prints:

Joining by: "x"

这对交互式工作很好，但我在 Rscript 中运行，所有这些行都阻塞了我的屏幕.

that is nice for interactive work, but I am running in Rscript and all these lines are clogging my screen.

推荐答案

如果你想大手大脚，你可以这样做

If you want to be heavy-handed, you can do

aa = suppressMessages(inner_join(a, b))

正如 Jazzurro 建议的那样，更好的选择是指定 by 参数.dplyr 只打印一条消息，让您知道它对要加入的列的猜测.如果你不让它猜测，它就不会与你确认事情.从防御性编码的角度来看，这也是一个更安全的选择.

The better choice, as Jazzurro suggests, is to specify the by argument. dplyr only prints a message to let you know what its guess is for which columns to join by. If you don't make it guess, it doesn't confirm things with you. This is a safer choice as well, from defensive coding standpoint.

如果这是在 knitr 文档中，您可以设置块选项 message=FALSE.

If this is in a knitr document, you can set the chunk option message=FALSE.

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