R split on delimiter (split) 保留分隔符 (split) [英] R split on delimiter (split) keep the delimiter (split)

问题描述

在 R 中，您可以使用 strsplit 函数在分隔符上拆分向量(split)，如下所示:

In R you can use the strsplit function to split a vector on a delimiter(split) as follows:

x <- "What is this?  It's an onion.  What! That's| Well Crazy."
unlist(strsplit(x, "[\\?\\.\\!\\|]", perl=TRUE))

## [1] "What is this"    "  It's an onion" "  What"          " That's"        
## [5] " Well Crazy"

我想使用 R 保留分隔符(split).因此所需的输出是:

I'd like to keep the delimiter(split) using R. So the desired output would be:

## [1] "What is this?"    "  It's an onion." "  What!"          " That's|"        
## [5] " Well Crazy."

推荐答案

你可以使用"(?<=DELIMITERS)":

unlist(strsplit(x, "(?<=[?.!|])", perl=TRUE))

## [1] "What is this?"    "  It's an onion." "  What!"          " That's|"        
## [5] " Well Crazy.

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