我正在尝试将列中的所有数据转换为“首字母大写” 以下代码将所有数据替换为第一行
simpleCap <- function(x) {
s <- strsplit(x, " ")[[1]]
paste(toupper(substring(s, 1,1)), substring(s, 2),
sep="", collapse=" ")
}
allDestination$Categories <- simpleCap(allDestination$Categories)
样本数据
japan/okinawa/okinawa-other-islands
japan/hokkaido/hokkaido-north/furano-biei-tomamu
japan/hokkaido/hokkaido-north/asahikawa-sounkyo
japan/hokkaido/hokkaido-north/wakkanai-rishiri-rebun
japan/hokkaido/hokkaido-east/kushiro-akan-nemuro
功能代码示例来自 First letter to upper case
如何使函数成为“列兼容”而不是仅替换单个值?
答案 0 :(得分:1)
您可以在后面使用否定的外观,以大写每个以非字母开头或在句子开头的字母,即(?:^|(?<=\\W))(.)
,也可以将其视为大写不以字母开头,即(?<!\\w)(.)
gsub("(?<!\\w)(.)","\\U\\1",dat1$V1,perl = TRUE)
[1] "Japan/Okinawa/Okinawa-Other-Islands"
[2] "Japan/Hokkaido/Hokkaido-North/Furano-Biei-Tomamu"
[3] "Japan/Hokkaido/Hokkaido-North/Asahikawa-Sounkyo"
[4] "Japan/Hokkaido/Hokkaido-North/Wakkanai-Rishiri-Rebun"
[5] "Japan/Hokkaido/Hokkaido-East/Kushiro-Akan-Nemuro"
数据:
dat1=read.table(strip=T,text="japan/okinawa/okinawa-other-islands
japan/hokkaido/hokkaido-north/furano-biei-tomamu
japan/hokkaido/hokkaido-north/asahikawa-sounkyo
japan/hokkaido/hokkaido-north/wakkanai-rishiri-rebun
japan/hokkaido/hokkaido-east/kushiro-akan-nemuro")
答案 1 :(得分:1)
Tidyverse答案-此 stringr :: str_to_title
有专门的功能library(tidyverse)
数据示例:
data_1 <-
data.frame("japan/okinawa/okinawa-other-islands",
"japan/hokkaido/hokkaido-north/furano-biei-tomamu",
"japan/hokkaido/hokkaido-north/asahikawa-sounkyo",
"japan/hokkaido/hokkaido-north/wakkanai-rishiri-rebun",
"japan/hokkaido/hokkaido-east/kushiro-akan-nemuro",
stringsAsFactors=FALSE)
工作功能:
> str_to_title(data_1)
[1] "Japan/Okinawa/Okinawa-Other-Islands"
[2] "Japan/Hokkaido/Hokkaido-North/Furano-Biei-Tomamu"
[3] "Japan/Hokkaido/Hokkaido-North/Asahikawa-Sounkyo"
[4] "Japan/Hokkaido/Hokkaido-North/Wakkanai-Rishiri-Rebun"
[5] "Japan/Hokkaido/Hokkaido-East/Kushiro-Akan-Nemuro"