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Full Discussion: Sum of a column as new column based on header in a script
Top Forums Shell Programming and Scripting Sum of a column as new column based on header in a script Post 303026035 by mkathi on Sunday 18th of November 2018 02:23:18 PM
Old 11-18-2018
Sum of a column as new column based on header in a script
Hello,

I am trying to store sum of a column as a new column inside a file but have to find the column names dynamically


I/p
Code:
c1,c2,c3,c4,c5
10,20,30,40,50
20,30,40,50,60

If i want to find sum only column c1, c3 and output it as c6,c7
O/p
Code:
c1,c2,c3,c4,c5,c6,c7
10,20,30,40,50,30,70
20,30,40,50,60,30,70


note that i want to do this dynamically what i mean is i do not know the position of the column and i want to do this sum for multiple columns

I can get the total sum of each column like this

Code:
#!/bin/sh
awk -F, '{for(i=1;i<=NF;i++)a[i]+=$i}
        END{for(i=1;i<=NF;i++)printf "%d%s", a[i], (i==NF?"\n":",")}'file

but how can i get the sum of each column as a seperate column in the file especially when i do not know the position of that column.

Thanks.
 

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LEARN ABOUT PHP

db2_field_precision

DB2_FIELD_PRECISION(3)							 1						    DB2_FIELD_PRECISION(3)

db2_field_precision - Returns the precision of the indicated column in a result set

SYNOPSIS

       int db2_field_precision (resource  $stmt, mixed	$column)

DESCRIPTION

	Returns the precision of the indicated column in a result set.

PARAMETERS

	      o $stmt
		- Specifies a statement resource containing a result set.

	      o $column
		-  Specifies  the  column in the result set. This can either be an integer representing the 0-indexed position of the column, or a
		string containing the name of the column.

RETURN VALUES

	Returns an integer containing the precision of the specified  column.  If  the	specified  column  does  not  exist  in  the  result  set,
       db2_field_precision(3) returns FALSE.

SEE ALSO

       db2_field_display_size(3), db2_field_name(3), db2_field_num(3), db2_field_scale(3), db2_field_type(3), db2_field_width(3).

PHP Documentation Group 												    DB2_FIELD_PRECISION(3)
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