gsub提取两个单词

Question

I cannot get my head around gsub() . 我无法gsub() 。 If text is: 如果文字是：

 text <- "Genus_species_1652_NL"

How would I extract to get 我将如何提取

"Genus species"

Answer 1

You can do this like: 你可以这样做：

> gsub('([A-z]+)_([A-z]+)_.*', '\\1 \\2', text)
[1] "Genus species"

but as mentioned in a comment, a tool like strsplit may be more useful. 但正如评论中所提到的，像strsplit这样的工具可能更有用。