从字符串中提取值

Question

如果我有这些字符串:

df$value[1] = "3d 4H 59M"
df$value[2] = "7d 10H 46M"
df$value[3] = "12d 2H 4M"

d = days
H = Hours
M = Minutes

正如您所看到的,记录有时会给出带有2个数字的天数,带有1个数字的小时数.法线是每种类型的1到2个数字,D,H,M.在这种情况下,如何提取每个D,H,M的值？

数据

x <- c("3d 4H 59M", "7d 10H 46M", "12d 2H 4M")

Answer 1

你可以使用stringr::str_match:

library(stringr)

values = c("3d 4H 59M", "7d 10H 46M", "12d 2H 4M")

dhm <- str_match(values, "([0-9]{1,2})d ([0-9]{1,2})H ([0-9]{1,2})M")[,-1]
storage.mode(dhm) <- "integer"
colnames(dhm) <- c("Days", "Hours", "Minutes")

dhm
#     Days Hours Minutes
#[1,]    3     4      59
#[2,]    7    10      46
#[3,]   12     2       4