r - 删除字符串中特定字符后的 n 个字符

Question

我试图弄清楚如何使用 R 以下列方式从字符串中删除引文编号：

原始字符串：

"There were 100 people outside.231 They were sharing 10 hotdogs.42 Nice!"

所需字符串：

"There were 100 people outside. They were sharing 10 hotdogs. Nice!"

但诚然，我对正则表达式非常不满意。有人可能有任何想法吗？谢谢！

标签： rregex

Answer 1

您可以尝试(?<=\\.)\\d+匹配句号后的数字，例如，

> gsub("(?<=\\.)\\d+", "", s, perl = TRUE)
[1] "There were 100 people outside. They were sharing 10 hotdogs. Nice!"

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一种更有效的方法（感谢@JvdV 的评论）可能是

gsub("\\.\\d+", ".", s, perl = TRUE)