r regex extract text before number including it

Question

there, I'm trying to extract the text before the number, including it, using regex in R.

As an example:

string <- "Fallen tree at Barth Avenue nº 34. Center Cause Effect (CCE) #omg"

Desired result: "Fallen tree at Barth Avenue nº 34"

I have found some ways to do this task without including the number, but that is not what I need. sub(pattern='[0-9]+.*', replacement='', x=string) "Fallen tree at Barth Avenue nº "

thks in advance

Answer 1

我们可以捕获以零或多个非数字开头的字符（^），后跟一个或多个数字作为一个组后跟其他字符，并将其替换为反向引用（\\1）捕获组

sub("^([^0-9]*\\d+).*", "\\1", string)
#[1] "Fallen tree at Barth Avenue nº 34"