Visit Our UNIX and Linux User Community

Read n lines from a text files getting n from within the text file

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Read n lines from a text files getting n from within the text file
# 8  
Old 09-13-2013
Don! Thank you.

This works, it does the job for sure, and yes you are right I had a mistake in the data for the first block, its suppossed to be 14 lines in the first block, and the header is supposed to be
#data: 14

I truly appreciate your assistance.

Thank you
# 9  
Old 09-13-2013
Thank you again everyone especially Don for your assistance. This has worked perfectly, and finally here is my script that plots the data the way I want

#! /bin/bash
# read each block and output to a file
awk '
$1 == ">" {
        if(f) close(f)
        f="file" ++n".txt"
{       print > f
}' UNZA2250.txt
# count the # of block to plot
nx=`awk '{c+=gsub(s,s)}END{print c}' s='>' UNZA2250.txt`
echo $nx
# --------------------------------------
gnuplot << EOF
# set size 1.7,1.3
set terminal postscript eps enhanced color "Helvetica" 30
set output "fig.eps"
set ylabel "TEC"
set xlabel "hour"
set xrange [0:24]
set yrange [0:120]
set nokey

filename(n) = sprintf("file%d.txt", n)
plot for [i=1:$nx] filename(i) using 1:4 with lines
# view the output image
gv fig.eps &
# remove the text files used for ploting
rm file*.txt

The data file is attached, the output figure is what I am looking for.

If there is a better and/or easier way to achieve this, I would love to learn. Especially if there can be a way to use the awk within gnuplot without having to output the data to the files as I have done here.

Thank you again

Previous Thread | Next Thread
Test Your Knowledge in Computers #167
Difficulty: Easy
The Transmission Control Protocol (TCP) is one of the least used protocols of the Internet protocol suite.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Match text to lines in a file, iterate backwards until text or text substring matches, print to file

hi all, trying this using shell/bash with sed/awk/grep I have two files, one containing one column, the other containing multiple columns (comma delimited). file1.txt abc12345 def12345 ghi54321 ... file2.txt abc1,text1,texta abc,text2,textb def123,text3,textc gh,text4,textd... (6 Replies)
Discussion started by: shogun1970
6 Replies

2. Shell Programming and Scripting

Read text between regexps and write into files based on a field in the text

Hi, I have a huge file that has data something like shown below: huge_file.txt start regexp Name=Name1 Title=Analyst Address=Address1 Department=Finance end regexp some text some text start regexp Name=Name2 Title=Controller Address=Address2 Department=Finance end regexp (7 Replies)
Discussion started by: r3d3
7 Replies

3. Shell Programming and Scripting

Extracting lines from text files in folder based on the numbers in another file

Hello, I have a file ff.txt that looks as follows *ABNA.txt 356 24 36 112 *AC24.txt 457 458 321 2 ABNA.txt and AC24.txt are the files in the folder named foo1. Based on the numbers in the ff.txt file, I want to extract the lines from the corresponding files in the foo1 folder and... (2 Replies)
Discussion started by: mohamad
2 Replies

4. Shell Programming and Scripting

Comparing 2 text files & downloading a file if the last lines are different

Hello I'm having a little difficulty in writing a shell script for a few simple tasks. First I have two files "file1.txt" and "file2.txt" and I want to read and compare the last line of each file. The files look like this. File1.txt File2.txt After comparing the two lines I would... (2 Replies)
Discussion started by: RustikGaming
2 Replies

5. Shell Programming and Scripting

Read text between two lines containing a string

Hi, I have text file like the following: Start a b 121 c d End Start a 31 e f End Start p o i k (5 Replies)
Discussion started by: ysrini
5 Replies

6. UNIX for Dummies Questions & Answers

Extracting lines from a text file based on another text file with line numbers

Hi, I am trying to extract lines from a text file given a text file containing line numbers to be extracted from the first file. How do I go about doing this? Thanks! (1 Reply)
Discussion started by: evelibertine
1 Replies

7. Shell Programming and Scripting

[bash help]Adding multiple lines of text into a specific spot into a text file

I am attempting to insert multiple lines of text into a specific place in a text file based on the lines above or below it. For example, Here is a portion of a zone file. IN NS ns1.domain.tld. IN NS ns2.domain.tld. IN ... (2 Replies)
Discussion started by: cdn_humbucker
2 Replies

8. Shell Programming and Scripting

Shell script to read lines in a text file and filter user data

hi all, I have this file with some user data. example: $cat myfile.txt FName|LName|Gender|Company|Branch|Bday|Salary|Age aaaa|bbbb|male|cccc|dddd|19900814|15000|20| eeee|asdg|male|gggg|ksgu|19911216||| aara|bdbm|male|kkkk|acke|19931018||23| asad|kfjg|male|kkkc|gkgg|19921213|14000|24|... (4 Replies)
Discussion started by: srimal
4 Replies

9. Shell Programming and Scripting

Read any lines of text from file

Witam wszystkich , Jest to moj pierwszy post i już prośba ale gdybym potrafił zaradzić problemowi to nie zawracałbym nikomu głowy . mianowicie : Mam jakis 'plik' w ktorym są osadzone pojedyncze i zmienne słowa po jednym w lini czyli : test1 tekttw resst .... itd. Moje... (6 Replies)
Discussion started by: versace
6 Replies

10. Shell Programming and Scripting

read list of filenames from text file and remove these files in multiple directories

I have a large list of filenames from an Excel sheet, which I then translate into a simple text file. I'd like to use this list, which contains various file extensions , to archive these files and then remove them recursively through multiple directories and subdirectories. So far, it looks like... (5 Replies)
Discussion started by: fxvisions
5 Replies

Featured Tech Videos