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Full Discussion: Column sum
Top Forums Shell Programming and Scripting Column sum Post 302978063 by Akshay Hegde on Tuesday 26th of July 2016 12:56:35 AM
Old 07-26-2016
This may help you

Input
Code:
[akshay@localhost tmp]$ cat file
First Column Header |Second Column Header| 	Third Column Header|	Fourth Column Header| Fifth Column Header
DATA1|	1.4|22.80|	6.6|6.55
DATA2|	1.4|NA|	6.8|6.83
DATA3|	2.4|22.80|	4.5|	4.45
DATA4|	4.4|NA|	8.8|	8.77
DATA5|	5.4|22.80|	NA|	10.93

Script
Code:
[akshay@localhost tmp]$ cat test.awk
BEGIN{
        # if variable cols not defined exit with below message to user
	if(cols==""){ print "Please mention column number separated by comma" ; exit }

        # split string cols separated by comma and save columns to be added in array c
	split(cols,c,/,/)
}
FNR>1{
        # Skip header and loop through array c and sum up fields, save result in array s
	for(i in c)
		s[c[i]]+= $(c[i])
}1
END{
        # Loop through fields and print result
	for(i=1; i<=NF; i++){		
		printf("%s%s",(i==1?"":OFS),(i in s ? s[i] : "NA"))
	}
	print ""
}

How to Execute
Code:
[akshay@localhost tmp]$ awk -vFS='|' -vOFS='|' -vcols="2,3,4,5" -f test.awk file

Output
Code:
First Column Header |Second Column Header| 	Third Column Header|	Fourth Column Header| Fifth Column Header
DATA1|	1.4|22.80|	6.6|6.55
DATA2|	1.4|NA|	6.8|6.83
DATA3|	2.4|22.80|	4.5|	4.45
DATA4|	4.4|NA|	8.8|	8.77
DATA5|	5.4|22.80|	NA|	10.93
NA|15|68.4|26.7|37.53


Last edited by Akshay Hegde; 07-26-2016 at 02:08 AM.. Reason: To add comments for better reading
This User Gave Thanks to Akshay Hegde For This Post:
 

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PG_FETCH_ALL_COLUMNS(3) 												   PG_FETCH_ALL_COLUMNS(3)

pg_fetch_all_columns - Fetches all rows in a particular result column as an array

SYNOPSIS
array pg_fetch_all_columns (resource $result, [int $column]) DESCRIPTION
pg_fetch_all_columns(3) returns an array that contains all rows (records) in a particular column of the result resource. Note This function sets NULL fields to the PHP NULL value. PARAMETERS
o $result - PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others). o $column - Column number, zero-based, to be retrieved from the result resource. Defaults to the first column if not specified. RETURN VALUES
An array with all values in the result column. FALSE is returned if $column is larger than the number of columns in the result, or on any other error. EXAMPLES
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pg_fetch_all(3). PHP Documentation Group PG_FETCH_ALL_COLUMNS(3)
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