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In Python, I have just read a line form a text file and I'd like to know how to code to ignore comments with a hash # at the beginning of the line. I think it should be something like this: for if line !contain # then ...process line else end for loop But I'm new to Python and I don't know the syntax you can use startswith() eg for line in open("file"): li=line.strip() if not li.startswith("#"): print line.rstrip() I recommend you don't ignore the whole line when you see a # character; just ignore the rest of the line. You can do that easily with a string method function called partition :

Data.txt: Index;Time; 1;2345; 2;1423; 3;5123; The code: dat <- read.table('data.txt', skip = 1, nrows = 2, header =TRUE, sep =';') The result: X1 X2345 1 2 1423 2 3 5123 I expect the header to be Index and Time, as follows: Index Time 1 2 1423 2 3 5123 How do I do that? Beasterfield I am afraid, that there is no direct way to achieve this. Either you read the entire table and remove afterwards the lines you don't want or you read in the table twice and assign the header later: header <- read.table('data.txt', nrows = 1, header = FALSE, sep =';', stringsAsFactors = FALSE) dat <- read.table(

I have a very long file which I want to print but skipping the first 1e6 lines for example. I look into the cat man page but I did not see any option to do this. I am looking for a command to do this or a simple bash program. SingleNegationElimination You'll need tail. Some examples: $ tail great-big-file.log < Last 10 lines of great-big-file.log > If you really need to SKIP a particular number of "first" lines, use $ tail -n +<N+1> <filename> < filename, excluding first N lines. > That is, if you want to skip N lines, you start printing line N+1. Example: $ tail -n +11 /tmp/myfile < /tmp

I want to skip the first 17 lines while reading a text file. Let's say the file looks like: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 good stuff I just want the good stuff. What I'm doing is a lot more complicated, but this is the part I'm having trouble with. wim Use a slice, like below: with open('yourfile.txt') as f: lines_after_17 = f.readlines()[17:] If the file is too big to load in memory: with open('yourfile.txt') as f: for _ in range(17): next(f) for line in f: # do stuff Ismail Badawi Use itertools.islice , starting at index 17. It will automatically skip the 17 first lines. import itertools

This question already has an answer here: How can I read the header but also skip lines - read.table()? 5 answers I have a CSV file with two header rows, the first row I want to be the header, but the second row I want to discard. If I do the following command: data <- read.csv("HK Stocks bbg.csv", header = T, stringsAsFactors = FALSE) The first row becomes the header and the second row of the file becomes the first row of my data frame: Xaaaaaaaaa X X.1 Xbbbbbbbbbb X.2 X.3 1 Date PX_LAST NA Date PX_LAST NA 2 31/12/2002 38.855 NA 31/12/2002 19.547 NA 3 02/01/2003 38.664 NA 02/01/2003 19.547 NA