如何将拆分字符串应用于向量？

I want to split based on :: but it doesnt work for the entire vector

我想基于::但它不适用于整个矢量

str<- c("bob::jhh","jjj::dfff")
data<- as.data.frame(x)
data

data$new.col <-strsplit(as.character(b[,1]),"::")[[1]][2]
data

output

产量

       data new.col
1  bob::jhh     jhh
2 jjj::dfff     jhh #<<--this should be dfff not jhhh.

any idea how to make it return jhh dfff instead of jhh jhh?

任何想法如何让它返回jhh dfff而不是jhh jhh？

2 个解决方案

#1

sapply can be used here:

sapply可以在这里使用：

str<- c("bob::jhh","jjj::dfff")
ss = strsplit(str, split="::")
sapply(ss, function(x) x[2])
[1] "jhh"  "dfff"

It can be put in the dataframe:

它可以放在数据帧中：

nn = sapply(ss, function(x) x[2])
dataf$new = nn
dataf
        str  new
1  bob::jhh  jhh
2 jjj::dfff dfff

#2

strsplit returns a list, so you need to process that list. For example

strsplit返回一个列表，因此您需要处理该列表。例如

str <- c("bob::jhh","jjj::dfff", "another::string", "foo::bar")
dat <- do.call(rbind, strsplit(str, split="::"))

This creates a matrix, first column is everything on left of :: and second column everything on the right of ::

这会创建一个矩阵，第一列是::左边的所有内容，第二列是右边的所有内容::