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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_num

DB2_FIELD_NUM(3)							 1							  DB2_FIELD_NUM(3)

db2_field_num - Returns the position of the named column in a result set

SYNOPSIS

       int db2_field_num (resource  $stmt, mixed  $column)

DESCRIPTION

	Returns the position of the named 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 0-indexed position of the named column in the result set. If the specified column does not exist in  the
       result set, db2_field_num(3) returns FALSE.

SEE ALSO

       db2_field_display_size(3), db2_field_name(3), db2_field_precision(3), db2_field_scale(3), db2_field_type(3), db2_field_width(3).

PHP Documentation Group 													  DB2_FIELD_NUM(3)
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