如何在带有R的字符串中的货币字之前获取值？

Question

如果这是非常基本的话，请提前道歉！

我有以下字符串：

text <- "Odebrecht has admitted to paying $29 million in bribes to public officials in Peru between 2005 and 2014 in exchange for $12.5 billion in contracts."

如何获得“百万”和“十亿”之前的金额？

提前致谢！

Answer 1

这是一个stringr解决方案，使用外观和正则表达式。我匹配后跟\\S或的非空格字符million和空格billion。

text <- "Odebrecht has admitted to paying $29 million in bribes to public officials in Peru between 2005 and 2014 in exchange for $12.5 billion in contracts."

library(stringr)
text %>%
  str_extract_all("\\S*? (?=(million|billion))", simplify = TRUE) %>%
  str_trim()
#> [1] "$29"   "$12.5"

由reprex package（v0.2.0）创建于2018-03-14。