Regex,根据标点符号R分开?

其中一个选项是使用regex lookaround提取数值部分

library(tidyverse)
data_frame(lat = str_extract(lines, "(?<=\\()-?[0-9.]+"), 
           lon = str_extract(lines, "-?[0-9.]+(?=\\))"))
# A tibble: 5 x 2
#  lat       lon       
#  <chr>     <chr>     
#1 42.252352 -71.075213
#2 42.332339 -71.246592
#3 42.335954 -71.107661
#4 42.09707  -71.065645
#5 42.465496 -71.121408

或与 read.csv 删除字符后,直到 ( ,包括 ( 和 ) (最后)与 gsub ,使 , 作为 读.csv 分成两列

read.csv(text = gsub("^[^(]+\\(|\\)$", "", lines), header=FALSE, 
          col.names = c("lat", "lon"))
#    lat       lon
#1 42.25235 -71.07521
#2 42.33234 -71.24659
#3 42.33595 -71.10766
#4 42.09707 -71.06565
#5 42.46550 -71.12141

数据

lines <- readLines("file.txt")