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How do I center-align a column in UNIX?

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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}

0

I’m trying to center-align a column using the command column.

The output should look like this:

temperatures  

    50  

    12  

    89  

    63  

How can I do this?

shell columns

share|improve this question

edited May 1 '15 at 23:20

yellowantphil

56211 gold badge33 silver badges1919 bronze badges

asked May 1 '15 at 22:27

billy klarrbilly klarr

2944 bronze badges

bumped to the homepage by Community♦ 1 hour ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How about your input? Does it only have this column left-aligned?
  
  – rahul
  May 1 '15 at 22:36
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yes. the input file is just 50 12 89 63 in a column. when i run the file i want it to be center aligned.
  
  – billy klarr
  May 1 '15 at 22:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I didn’t notice that you wanted to use the column command until I wrote my answer.
  
  – yellowantphil
  May 1 '15 at 23:11
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you really need to use the column command, nothing comes to mind. It prints text left-aligned.
  
  – yellowantphil
  May 1 '15 at 23:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What do you want your numbers centered in relation to?. Your sample output does not show them being centered in relation to temperatures.
  
  – Peter.O
  May 2 '15 at 8:57
  
  
  

  
  
  
  

 | 
show 1 more comment

0

I’m trying to center-align a column using the command column.

The output should look like this:

temperatures  

    50  

    12  

    89  

    63  

How can I do this?

shell columns

share|improve this question

edited May 1 '15 at 23:20

yellowantphil

56211 gold badge33 silver badges1919 bronze badges

asked May 1 '15 at 22:27

billy klarrbilly klarr

2944 bronze badges

bumped to the homepage by Community♦ 1 hour ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How about your input? Does it only have this column left-aligned?
  
  – rahul
  May 1 '15 at 22:36
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yes. the input file is just 50 12 89 63 in a column. when i run the file i want it to be center aligned.
  
  – billy klarr
  May 1 '15 at 22:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I didn’t notice that you wanted to use the column command until I wrote my answer.
  
  – yellowantphil
  May 1 '15 at 23:11
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you really need to use the column command, nothing comes to mind. It prints text left-aligned.
  
  – yellowantphil
  May 1 '15 at 23:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What do you want your numbers centered in relation to?. Your sample output does not show them being centered in relation to temperatures.
  
  – Peter.O
  May 2 '15 at 8:57
  
  
  

  
  
  
  

 | 
show 1 more comment

I’m trying to center-align a column using the command column.

The output should look like this:

temperatures  

    50  

    12  

    89  

    63  

How can I do this?

shell columns

share|improve this question

edited May 1 '15 at 23:20

yellowantphil

56211 gold badge33 silver badges1919 bronze badges

asked May 1 '15 at 22:27

billy klarrbilly klarr

2944 bronze badges

temperatures  

    50  

    12  

    89  

    63  

share|improve this question

edited May 1 '15 at 23:20

yellowantphil

56211 gold badge33 silver badges1919 bronze badges

asked May 1 '15 at 22:27

billy klarrbilly klarr

2944 bronze badges

share|improve this question

edited May 1 '15 at 23:20

yellowantphil

56211 gold badge33 silver badges1919 bronze badges

asked May 1 '15 at 22:27

billy klarrbilly klarr

2944 bronze badges

edited May 1 '15 at 23:20

yellowantphil

56211 gold badge33 silver badges1919 bronze badges

edited May 1 '15 at 23:20

yellowantphil

56211 gold badge33 silver badges1919 bronze badges

asked May 1 '15 at 22:27

billy klarrbilly klarr

2944 bronze badges

asked May 1 '15 at 22:27

billy klarrbilly klarr

2944 bronze badges

1 Answer
1

active

oldest

votes

0

I wrote this answer before noticing that you want to use the column command, but if that isn’t a requirement, you can center text with this bash shell script:

#!/bin/bash

set -e    # exit the script if something goes wrong



width=12

data="temperatures 50 12 89 63"



for word in $data; do

    strlen=$(printf $word | wc -c)

    w=$(( ($width - $strlen)/2 ))

    printf "%${w}s%sn" "" $word

done

How it works:

• 
  $width is the column width


• The for loop prints every word in $data
  


• 
  $strlen is the length of the current word, in bytes.


• 
  $w is the number of spaces to print before the word to make it centered.


• 
  printf prints $w spaces, followed by the word

Output:

temperatures

     50

     12

     89

     63

This script will only work for single-byte text encodings. You would need to change the strlen line to handle text containing a 🐱, for example.

share|improve this answer

edited May 1 '15 at 23:14

answered May 1 '15 at 22:50

yellowantphilyellowantphil

56211 gold badge33 silver badges1919 bronze badges

add a comment | 

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0

I wrote this answer before noticing that you want to use the column command, but if that isn’t a requirement, you can center text with this bash shell script:

#!/bin/bash

set -e    # exit the script if something goes wrong



width=12

data="temperatures 50 12 89 63"



for word in $data; do

    strlen=$(printf $word | wc -c)

    w=$(( ($width - $strlen)/2 ))

    printf "%${w}s%sn" "" $word

done

How it works:

• 
  $width is the column width


• The for loop prints every word in $data
  


• 
  $strlen is the length of the current word, in bytes.


• 
  $w is the number of spaces to print before the word to make it centered.


• 
  printf prints $w spaces, followed by the word

Output:

temperatures

     50

     12

     89

     63

This script will only work for single-byte text encodings. You would need to change the strlen line to handle text containing a 🐱, for example.

share|improve this answer

edited May 1 '15 at 23:14

answered May 1 '15 at 22:50

yellowantphilyellowantphil

56211 gold badge33 silver badges1919 bronze badges

add a comment | 

0

I wrote this answer before noticing that you want to use the column command, but if that isn’t a requirement, you can center text with this bash shell script:

#!/bin/bash

set -e    # exit the script if something goes wrong



width=12

data="temperatures 50 12 89 63"



for word in $data; do

    strlen=$(printf $word | wc -c)

    w=$(( ($width - $strlen)/2 ))

    printf "%${w}s%sn" "" $word

done

How it works:

• 
  $width is the column width


• The for loop prints every word in $data
  


• 
  $strlen is the length of the current word, in bytes.


• 
  $w is the number of spaces to print before the word to make it centered.


• 
  printf prints $w spaces, followed by the word

Output:

temperatures

     50

     12

     89

     63

This script will only work for single-byte text encodings. You would need to change the strlen line to handle text containing a 🐱, for example.

share|improve this answer

edited May 1 '15 at 23:14

answered May 1 '15 at 22:50

yellowantphilyellowantphil

56211 gold badge33 silver badges1919 bronze badges

add a comment | 

I wrote this answer before noticing that you want to use the column command, but if that isn’t a requirement, you can center text with this bash shell script:

#!/bin/bash

set -e    # exit the script if something goes wrong



width=12

data="temperatures 50 12 89 63"



for word in $data; do

    strlen=$(printf $word | wc -c)

    w=$(( ($width - $strlen)/2 ))

    printf "%${w}s%sn" "" $word

done

How it works:

• 
  $width is the column width


• The for loop prints every word in $data
  


• 
  $strlen is the length of the current word, in bytes.


• 
  $w is the number of spaces to print before the word to make it centered.


• 
  printf prints $w spaces, followed by the word

Output:

temperatures

     50

     12

     89

     63

This script will only work for single-byte text encodings. You would need to change the strlen line to handle text containing a 🐱, for example.

share|improve this answer

edited May 1 '15 at 23:14

answered May 1 '15 at 22:50

yellowantphilyellowantphil

56211 gold badge33 silver badges1919 bronze badges

#!/bin/bash

set -e    # exit the script if something goes wrong



width=12

data="temperatures 50 12 89 63"



for word in $data; do

    strlen=$(printf $word | wc -c)

    w=$(( ($width - $strlen)/2 ))

    printf "%${w}s%sn" "" $word

done

temperatures

     50

     12

     89

     63

share|improve this answer

edited May 1 '15 at 23:14

answered May 1 '15 at 22:50

yellowantphilyellowantphil

56211 gold badge33 silver badges1919 bronze badges

answered May 1 '15 at 22:50

yellowantphilyellowantphil

56211 gold badge33 silver badges1919 bronze badges

answered May 1 '15 at 22:50

yellowantphilyellowantphil

56211 gold badge33 silver badges1919 bronze badges