替换R中文本列中的一些字符答案

【问题标题】：Replacing some characters in a text column in R替换R中文本列中的一些字符
【发布时间】：2023-01-27 14:12:43
【问题描述】：

我有一个包含文本列的数据集，其中包含文本和一个以 sa 开头的术语，后面有两个 following digits。数据快照如下：

df_new <- data.frame(
  given_info=c('SA12 is given','he has his sa12',
         'she will get Sa15','why not having an sa31',
         'his SA23 is missing', 'sa12 is given'))

df_new %>% select(given_info)

              given_info
1          SA12 is given
2        he has his sa12
3      she will get Sa15
4 why not having an sa31
5    his SA23 is missing
6          sa12 is given

我需要用术语 document 替换任何带有 sa with the two digits 的术语。因此，感兴趣的结果是：

              given_info
1          document is given
2          he has his document
3          she will get document
4          why not having an document
5         his document is missing
6          document is given

非常感谢您的提前帮助！

【问题讨论】：

标签： regex dplyr text rstudio data-cleaning

【解决方案1】：

我们可以在这里使用gsub()，如下所示：

df_new$given_info <- gsub("\b[sS][aA]\d{2}\b", "document", df_new$given_info)
df_new

                  given_info
1          document is given
2        he has his document
3      she will get document
4 why not having an document
5    his document is missing
6          document is given

【讨论】：