CODEWITHSUNDEEP
r
Sharl
Sharl

Reputation: 175

Ignoring data lines in R

So I have read in data using readLine() I'm needing to apply a function to every line in the list except for example lets say the lines before line 15 and after like 30.

How am I meant to cut this data out of my original text data? I was thinking of maybe indexing the data I need like data[15] to data[30] and then using lapply() on the data within these bounds. I also thought about just deleting (or ignoring) the data lines unto line 15 and after line 30 but I have no idea where to start.

Upvotes: 2

Views: 53

Answers (1)

C8H10N4O2
C8H10N4O2

Reputation: 19015

If you want to keep only lines 15-30, it's simply:

# write something to a text file

nrow(iris)

write.table(iris, 'temp.txt', row.names=FALSE, quote=FALSE)

some_txt <- readLines(file('temp.txt'))[15:30]

length(some_txt)

If you want to keep everything except those lines then it's some_txt <- readLines(file('temp.txt'))[-(15:30)]. We're a little confused which subset you're looking for.

Upvotes: 1

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