delete lines and columns from a file Post: 302448676

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to delete last 3 columns in a file

Hii I have a file which contains huge amounts of data.I just want to delete last 3 columns in the without changing its format.The file contains data as shown below PDE 2001 10 29 202148.60 38.92 24.20 33 4.8 MLATH .F. ....... PDE 2001 10 29 203423.57 38.88 24.41 33 3.7 MLATH...

2. Shell Programming and Scripting

How to delete lines in a file that have duplicates or derive the lines that aper once

Input: a b b c d d I need: a c I know how to get this (the lines that have duplicates) : b d sort file | uniq -d But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem.

3. UNIX for Dummies Questions & Answers

Adding lines and columns to a file

Hi everybody, I've got two simples file1 like: aaa aaa aaa bbb bbb bbb ccc ccc ccc and file2 like: 111 111 111 222 222 222 333 333 333 I need to: 1) add a line say "new line" as the first line of the file 2)add a column from file2 (say column3) to file1; the new column should...

4. UNIX for Dummies Questions & Answers

How get only required lines & delete the rest of the lines in file

Hiiii I have a file which contains huge data as a.dat: PDE 1990 1 9 18 51 28.90 24.7500 95.2800 118.0 6.1 0.0 BURMA event name: 010990D time shift: 7.3000 half duration: 5.0000 latitude: 24.4200 longitude: 94.9500 depth: 129.6000 Mrr: ...

5. UNIX for Advanced & Expert Users

In a huge file, Delete duplicate lines leaving unique lines

Hi All, I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space. I dont know if this works : I want to read each line of the File in a For Loop, and want to...

6. UNIX for Dummies Questions & Answers

Delete large number of columns rom file

Hi, I have a data file that contains 61 columns. I want to delete all the columns except columns, 3,6 and 8. The columns are tab de-limited. How would I achieve this on the terminal? Thanks

7. UNIX for Dummies Questions & Answers

How to delete columns with numbers in an excel file?

Dear all, I have one file (see below) with more then 100 columns and 2500 rows, and need only column which has GType in label with Alphabets, please help me to remove these columns with numbers. input file is n.201.GType n-201.Theta n-201.R n_1.GType n_1.Theta n_1.R...

8. Shell Programming and Scripting

Delete 40 lines after every 24 lines from a file

Hello, I have file of more than 10000 lines. I want to delete 40 lines after every 20 lines. e.g from a huge file, i want to delete line no from 34 - 74, then 94 - 134 etc and so on. Please let me know how i can do it. Best regards,

9. Shell Programming and Scripting

Delete and insert columns in a tab delimited file

Hi all , I have a file having 12 columns tab delimited . I need to read this file and remove the column 3 and column 4 and insert a word in column 3 as "AVIALABLE " Is there a way to do this . I am trying like below Thanks DJ cat $FILENAME|awk -F"\t" '{ print $1 "\t...

10. UNIX for Beginners Questions & Answers

Delete columns with a specific title XXX, where the position change in each file

Goodmorning, I know how to cut a string and a column, and how to find a word. I have a file with over 100 columns. All columns have a title in the first line. I have to delete all columns with the XXX title. I can't use cut -f because the position of XXX columns change in each file, and in...

LEARN ABOUT PLAN9

pr

PR(1)							      General Commands Manual							     PR(1)

NAME

       pr - print file

SYNOPSIS

       pr [ option ...	] [ file ...  ]

DESCRIPTION

       Pr  produces  a printed listing of one or more files on its standard output.  The output is separated into pages headed by a date, the name
       of the file or a specified header, and the page number.	With no file arguments, pr prints its standard input.

       Options apply to all following files but may be reset between files:

       -n     Produce n-column output.

       +n     Begin printing with page n.

       -b     Balance columns on last page, in case of multi-column output.

       -d     Double space.

       -en    Set the tab stops for input text every n spaces.

       -h     Take the next argument as a page header (file by default).

       -in    Replace sequences of blanks in the output by tabs, using tab stops set every n spaces.

       -f     Use formfeeds to separate pages.

       -ln    Take the length of the page to be n lines instead of the default 66.

       -m     Print all files simultaneously, each in one column.

       -n     Number the lines of each file.

       -on    Offset the left margin n character positions.

       -sc    Separate columns by the single character c instead of aligning them with white space.  A missing c is taken to be a tab.

       -t     Do not print the 5-line header or the 5-line trailer normally supplied for each page.

       -wn    For multi-column output, take the width of the page to be n characters instead of the default 72.

SOURCE

       /sys/src/cmd/pr.c

SEE ALSO

       cat(1), lp(1)

																	     PR(1)