R删除字符串中的非字母数字符号

Question

我有一个字符串，我想从中删除所有非字母数字符号，然后放入矢量中。所以这个：

"This is a string. In addition, this is a string!" 

将成为：

>stringVector1 

"This","is","a","string","In","addition","this","is","a","string" 

我看了grep()，但无法找到匹配的例子。有什么建议么？

Answer 1

这里有一个例子：

> str <- "This is a string. In addition, this is a string!" 
> str 
[1] "This is a string. In addition, this is a string!" 
> strsplit(gsub("[^[:alnum:] ]", "", str), " +")[[1]] 
[1] "This"  "is"  "a"  "string" "In"  "addition" "this"  "is"  "a"  
[10] "string"