Delete and insert columns in a tab delimited file Post: 302930492

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Reading columns in tab delimited file

I want to read only one column in "|" delimited file and write that column to a new file. For Ex: Input File 1|abc|324|tt 2|efd|11|cbcb 3||1|fg 4|ert|23|88 Output : I want to read column 3 in diff file. 324 11 1 88 Can anyone give me inputs on this ?

2. UNIX for Dummies Questions & Answers

Adding EMPTY columns to Tab-delimited txt file

Hi I have a txt file with 4 columns where I need to add 4 empty columns in the middle meaning that I need what is currently column 4 to be column 8 in a new file. The idea is that I have to use the file as input in a program that reads the data in column 1 and 8, so the content of the other...

3. Shell Programming and Scripting

Delete first column in tab-delimited text-file

I have a large text-file with tab-delimited genetic data that looks like: KSC112 KSC234 0 0 1 1 A G C T I simply wan to delete the first column, but since the file has 600 000 columns, it is not possible with awk (seems to be limited at 32k columns). Does anyone have an idea how to do this?

4. Shell Programming and Scripting

insert a field into a tab delimited file

Hello, Can someone help me to do this with awk or sed? I have a file with multiple lines, each line has many fields separated with a tab. I would like to add one more field holding 'na' in between the first and second fields. old file looks like, 1, field1 field2 field3 ... 2, field1...

5. UNIX for Dummies Questions & Answers

Insert Field into a tab-delimited file

Hello, I have about 100 files in a directory with fields which are tab delimited. I would like to append the file name as the first field and it has to be done as many times as the total lines in the file. For example, myFile1.txt has the following data: 1 x y z 2 a b ...

6. UNIX for Dummies Questions & Answers

nth Columns in a Tab delimited file

Hi Can anyone help me to identify the nth field from a Tab delimited file? Thanks Subrat

7. UNIX for Dummies Questions & Answers

Deleting columns from a tab delimited text file?

I have a tab limited text file with 10000+ columns. I want to delete columns 6 through 23, how do I go about doing that? Thanks!

8. Shell Programming and Scripting

Parse tab delimited file, check condition and delete row

I am fairly new to programming and trying to resolve this problem. I have the file like this. CHROM POS REF ALT 10_sample.bam 11_sample.bam 12_sample.bam 13_sample.bam 14_sample.bam 15_sample.bam 16_sample.bam tg93 77 T C T T T T T tg93 79 ...

9. Shell Programming and Scripting

Delete an entire column from a tab delimited file

Hi, Can anyone please tell me about how we can delete an entire column from a tab delimited file? Mu input_file.txt looks like this: And I want the output as: I used the below code nawk -v d="1" 'BEGIN{FS=OFS="\t"}{$d=""}{print}' input_file.txtBut in the output, the first column is...

10. Shell Programming and Scripting

Remove blank columns from a tab delimited text file

Hello, I have some tab delimited files that may contain blank columns. I would like to delete the blank columns if they exist. There is no clear pattern for when a blank occurs. I was thinking of using sed to replace instances of double tab with blank, sed 's/\t\t//g' All of the examples...

LEARN ABOUT OSX

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Reading columns in tab delimited file

Discussion started by: net

2. UNIX for Dummies Questions & Answers

Adding EMPTY columns to Tab-delimited txt file

Discussion started by: Banni

3. Shell Programming and Scripting

Delete first column in tab-delimited text-file

Discussion started by: andmal

4. Shell Programming and Scripting

insert a field into a tab delimited file

Discussion started by: ssshen