R 读线未知n

在gui（无论是Windows gui还是RStudio等）中，我可以通过指定

n=？

使用脚本中的

readLines

，已知行数如下所示。如果我不确定正在读取的行数（即，我有很多行，不知道n），该怎么办。如何在gui中使用

readLines

（从外部文件中的脚本读取）而不指定n？如果不提供n，则会出现

readLines

以保持连接打开并保持读取线路。按esc键将停止该功能，但不会读取任何行

x <- readLines(n=4)
** preparing package for lazy loading
** help
*** installing help indices
** building package indices

x

编辑，直到重新打开，Dason可以自己回答

Dason建议使用ctrl+z，这可以（至少在Windows机器上）实现两个简单的解决方案

将文本放入另一个文件中，并读取该文件

不要使用

readLines

。引述案文：

x两个简单的解决方案

将文本放入另一个文件中，并读取该文件

不要使用
readLines
。引述案文：


x您可以在文本周围加引号，并创建一个
textConnection
来阅读

text <- "** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices"

readLines(textConnection(text))
# [1] "** preparing package for lazy loading" "** help"                              
# [3] "*** installing help indices"           "** building package indices"          
# [5] "** preparing package for lazy loading" "** help"                              
# [7] "*** installing help indices"           "** building package indices"          
# [9] "** preparing package for lazy loading" "** help"                              
#[11] "*** installing help indices"           "** building package indices"          
#[13] "** preparing package for lazy loading" "** help"                              
#[15] "*** installing help indices"           "** building package indices"          
#[17] "** preparing package for lazy loading" "** help"                              
#[19] "*** installing help indices"           "** building package indices"  

text您可以在文本周围加引号，并创建一个
textConnection
来阅读

text <- "** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** preparing package for lazy loading
** help
*** installing help indices
** building package indices"

readLines(textConnection(text))
# [1] "** preparing package for lazy loading" "** help"                              
# [3] "*** installing help indices"           "** building package indices"          
# [5] "** preparing package for lazy loading" "** help"                              
# [7] "*** installing help indices"           "** building package indices"          
# [9] "** preparing package for lazy loading" "** help"                              
#[11] "*** installing help indices"           "** building package indices"          
#[13] "** preparing package for lazy loading" "** help"                              
#[15] "*** installing help indices"           "** building package indices"          
#[17] "** preparing package for lazy loading" "** help"                              
#[19] "*** installing help indices"           "** building package indices"  

选择并复制到剪贴板后，在Windows环境中执行以下操作：

 (clip.input <- readLines( file("clipboard") ) )

（在Windows环境中选择并复制到剪贴板后，clip.input：

 (clip.input <- readLines( file("clipboard") ) )

（clip.input您不需要指定行数。它会一直读取，直到连接停止提供。如何停止连接读取？它读取到文件的末尾。（我必须缺少一个关键的透视图。您可以打开到编辑缓冲区的连接吗？）你试过control-D吗？我在攒点钱买新车。你不需要指定行数。它会一直读取，直到连接停止提供。那么如何停止连接读取？它会读取到文件末尾。（我一定错过了一个关键的视角。你能打开一个到编辑缓冲区的连接吗？）你试过control-D吗？我在攒钱买一辆新车。我想这最接近我想用最少的工作量完成的精神。我想这最接近我想用最少的工作量完成的精神。@mnel谢谢你的编辑。@mnel谢谢你的编辑。
 (clip.input <- readLines( pipe("pbpaste") ) )