10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Hi there,
I am trying to remove al letters after : character on specific columns from 10th column till 827. I used sed and cut to do so but I am sure there is better one liner someone can think of from unix community members.
Huge file but it has this structure (Total number of Columns =... (10 Replies)
Discussion started by: daashti
10 Replies
2. UNIX for Dummies Questions & Answers
Hi All,
I am new to shell scripting. I have a requirement as part of my job to find out null/empty values in column 2 and column 3 from a CSV file and exit the further execution of script by displaying a simple error message.
I have developed a script to do this by reading various articles... (7 Replies)
Discussion started by: tpk
7 Replies
3. Shell Programming and Scripting
Hi all,
I have a large matrix of 720 x 25. I want to get sum of range of rows and columns. Like, I need sum of all columns and row number 2 to 21, then leaving 22nd row, again sum of all columns and row number 23 to 42 again leaving 43rd row and then sum of 44th to 63. Means I want to add all... (4 Replies)
Discussion started by: CAch
4 Replies
4. Shell Programming and Scripting
Hello,
I have a huge file with many columns . I want to use the names of the columns to print columns to another file.
for example
file.txt
COLA COLB COLC COLD
1 2 3 5
3 5 6 9
If I give name for multiple columns to the code:... (5 Replies)
Discussion started by: ryan9011
5 Replies
5. UNIX for Dummies Questions & Answers
Hello all,
I have a .csv file with over 100 columns. I would like to grep for a pattern only searching within a range of those fields, and print the entire line. For example: grep a pattern from columns $47-$87, but print fields $0 - $100
Thanks! (9 Replies)
Discussion started by: torchij
9 Replies
6. Shell Programming and Scripting
I have a huge matrix file which looks like this (example matrix):
1 2 3 5
4 5 6 7
7 6 8 9
1 2 4 2
7 6 5 1
3 2 1 9
As one can see, this matrix has 4 columns and 6 rows. But my original matrix has some 3 million rows and 6000 columns.
For example, on this matrix I can define my task as... (2 Replies)
Discussion started by: shoaibjameel123
2 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I have a query about joining files using data ranges.
Example files below - I want to join file1 to file2 with matches where file1 column 1 is equal to file2 column1, and file1 column 2 is within the range of file2 columns 3 and 4. I would like rows which don't match to be printed too.
... (4 Replies)
Discussion started by: auburn
4 Replies
8. UNIX for Dummies Questions & Answers
Hi, I'm just wondering how you display a specific set of columns of a specified file in Unix. For example, if you had an AddressBook file that stores the Names, Phone numbers, and Addresses of people the user entered in the following format (the numbers are just to give an idea of what column... (1 Reply)
Discussion started by: logorob
1 Replies
9. Shell Programming and Scripting
I'm writing a script to analyze the logs of an smtp relay machine and I'd like the final output to be displayed in columns showing results from the previous day, week, month, and 45 days. The problem I'm running into is that I can't figure out how to display the columns neatly so there is no... (1 Reply)
Discussion started by: jjamd64
1 Replies
10. Shell Programming and Scripting
i having problems figuring out how to 'read' in 3 different directory listings and then display them on the screen into 3 separate columns.
i thought i could use a 'for' loop to grab each directory and then assign a unique variable to each line 'read' in.
of course, as you experts all know,... (16 Replies)
Discussion started by: mjays
16 Replies
