Extract several columns with few rows Post: 302623169

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

# of rows and columns

Hi, Does anyone know the command to know the # of rows and columns for a file? thanks

2. Shell Programming and Scripting

Extract difference of two columns from different rows

Hello guys, Please help me to solve this problem. I have tried some awk commands but couldn't succeed. I have a tab delimited file where each record is separated by ------ and 4th column of each record is same. <INPUT FILE> ------ peon 53931587 53931821 ...

3. Shell Programming and Scripting

Extract values from a matrix given the rows and columns

Hi All, I have a huge (and its really huge!) matrix about 400GB in size (2 million rows by 1.5 million columns) . I am trying to optimize its space by creating a sparse representation of it. Miniature version of the matrix looks like this (matrix.mtx): 3.4543 65.7876 54.564 2.12344...

4. Shell Programming and Scripting

Rows to Columns

5. Shell Programming and Scripting

Deleting all the fields(columns) from a .csv file if all rows in that columns are blanks

Hi Friends, I have come across some files where some of the columns don not have data. Key, Data1,Data2,Data3,Data4,Data5 A,5,6,,10,, A,3,4,,3,, B,1,,4,5,, B,2,,3,4,, If we see the above data on Data5 column do not have any row got filled. So remove only that column(Here Data5) and...

6. Shell Programming and Scripting

Evaluate 2 columns, add sum IF two columns match on two rows

Hi all, I know this sounds suspiciously like a homework course; but, it is not. My goal is to take a file, and match my "ID" column to the "Date" column, if those conditions are true, add the total number of minutes worked and place it in this file, while not printing the original rows that I...

7. Shell Programming and Scripting

Columns to rows

Hi, I have a big file, with thousands of rows, and I want to put every 7 rows in a line. Input file: str1, val2, val3 str2, val4, val5 str3, val22, val33 str4, val44, val55 str5, val6, val7 str6, val77, val88 str7, val99, val00 str1, som2, som3 str2, som4, som5 str3, som22, som33 ...

8. Shell Programming and Scripting

Compare 2 csv files by columns, then extract certain columns of matcing rows

Hi all, I'm pretty much a newbie to UNIX. I would appreciate any help with UNIX coding on comparing two large csv files (greater than 10 GB in size), and output a file with matching columns. I want to compare file1 and file2 by 'id' and 'chain' columns, then extract exact matching rows'...

9. Shell Programming and Scripting

Extract rows with different values at 2 columns

Hallo, I would need to extract only rows which has different value in the second and third column. Thank you very much for any advices Input: A 0 0 B 0 1 C 1 1 D 1 3 Output B 0 1 D 1 3

10. UNIX for Beginners Questions & Answers

Rows to columns

trying to sort an array, only the 4th column is uniq, have this: dog cat bird house1 dog cat bird house2 dog cat bird house3 rose daisy tulip house1 rose daisy tulip house3 would like this: dog cat bird house1 house2 house3 rose daisy tulip house1 missing house3 any help...

LEARN ABOUT FREEBSD

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

# of rows and columns

Discussion started by: kylle345

2. Shell Programming and Scripting

Extract difference of two columns from different rows

Discussion started by: sam_2921

3. Shell Programming and Scripting

Extract values from a matrix given the rows and columns

Discussion started by: shoaibjameel123

4. Shell Programming and Scripting

Rows to Columns

Discussion started by: rakesh5300