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Full Discussion: Calculate the average of a column based on the value of another column
Top Forums Shell Programming and Scripting Calculate the average of a column based on the value of another column Post 302761979 by RudiC on Sunday 27th of January 2013 02:47:40 PM
Old 01-27-2013
PLEASE use code tags as demanded!
Try this as a starting point; the 40000 line I've left to your exercise...
Code:
awk 'NR==1  {print "id pos   mean.y"}
     NR>1   {tmp=($2-$2%10000)/10000;
             if (tmp!=cnt) {printf "%s %05d% 8.4f\n", ID, cnt*10000+1, sum/n; cnt=tmp; n=sum=0}
             ID=$1; sum+=$3; n++; 
            }
    ' file
id pos   mean.y
11 00001 179.6667
11 10001 307.5000
11 20001 781.0000
11 30001 121.0000
11 50001 981.0000

or
Code:
awk 'NR==1    {print "id pos   mean.y"; next}
              {tmp=($2-$2%10000)/10000}
     tmp!=cnt {printf "%s %05d% 8.4f\n", ID, cnt*10000+1, sum/n; cnt=tmp; n=sum=0}
              {ID=$1; sum+=$3; n++ }
    ' file

Last edited by RudiC; 01-27-2013 at 03:55 PM..
 

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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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