如何将txt文件转换为R中的数据框

Question

I have a .txt file like this:

<begin>
pwd
cd ~
<end>
<begin>
ls
vi
<end>
<begin>
cat
ls
pwd
<end>

etc I need to create a data frame from this text file. The code between and goes into the data frame.

For example, above data should represented in data frame as follows:

user1 pwd
user1 cd~
user2 ls
user2 vi
user3 cat
user3 ls
user3 pwd

etc

how would I do this in R?

Answer 1

One way:

Import your data:

dat <- readLines(textConnection("<begin>
pwd
cd ~
<end>
<begin>
ls
vi
<end>
<begin>
cat
ls
pwd
<end>"))

Then get your result:

result <- data.frame(user=cumsum(dat=="<begin>"),dat)
result[!result$dat %in% c("<begin>","<end>"),]

#   user  dat
#2     1  pwd
#3     1 cd ~
#6     2   ls
#7     2   vi
#10    3  cat
#11    3   ls
#12    3  pwd