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Top Forums Shell Programming and Scripting Average across multiple columns group by Post 302932968 by ritakadm on Monday 26th of January 2015 05:49:06 PM
Old 01-26-2015
sorry about not providing with a sample input, I`m using cygwin. The data range is 0 to 100,000 should be outputted upto 2 decimal places.
Data is 83000 lines, not very big.

Yes, the code calculates the average correctly for only the 7th column, although I should
populate arr as arr[$1" "$2" "$3" "$4" "$5] to get all the variables delimited.

Sample input has 4 data columns, I have many in the original data starting col7 until NF ($22).

Code:
  a1 b1 c1 d1 e1 12 13 14 15
  a1 b1 c1 d1 e1 14 15 16 17
  a1 b1 c1 d1 e1 13 14 15 16
  a2 b1 c1 d1 e1 112 113 114 115
  a2 b1 c1 d1 e1 114 115 116 117
  a2 b1 c1 d1 e1 113 114 115 116

Output should be

Code:
  a1 b1 c1 d1 e1 13 14 15 16
  a2 b1 c1 d1 e1 113 114 115 116

 

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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