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Full Discussion: Calculating average for every Nth line in the Nth column
Top Forums Shell Programming and Scripting Calculating average for every Nth line in the Nth column Post 302622493 by ncwxpanther on Thursday 12th of April 2012 08:17:14 AM
Old 04-12-2012
Calculating average for every Nth line in the Nth column
Is there an awk script that can easily perform the following operation?

I have a data file that is in the format of
Code:
1944-12,5.6
1945-01,9.8
1945-02,6.7
1945-03,9.3
1945-04,5.9
1945-05,0.7
1945-06,0.0
1945-07,0.0
1945-08,0.0
1945-09,0.0
1945-10,0.2
1945-11,10.5
1945-12,22.3
1946-01,35.2
1946-02,13.4

I need to find the average of the values contained within -01, -02, and -03.

For instance the average of
Code:
1945-01,9.8
1945-02,6.7
1945-03,9.3

Would output
Code:
1945-03, 8.6

Any help would be appreciative.
Thanks!
Last edited by Franklin52; 04-12-2012 at 09:18 AM.. Reason: Please use code tags for code and data samples, thank you
 

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LEARN ABOUT DEBIAN

dmtxquery

DMTXREAD(1)						      General Commands Manual						       DMTXREAD(1)

NAME

       dmtxquery - extract information from dmtxread output

SYNOPSIS

       dmtxquery PROPERTY [OPTION]... [FILE]...

DESCRIPTION

       dmtxquery extracts information from the XML output from dmtxread for individual or grouped barcode scan results.

PROPERTY

       barcode.count		 count of all barcodes found in image

       barcode.N.BPROP		 print BPROP property of Nth barcode

       message.count		 count of all messages found in image

       message.N.MPROP		 print MPROP property of Nth message

       message.N.barcode.count	 count of all barcodes in Nth message

       message.N.barcode.M	 Mth barcode of Nth message, print all

       message.N.barcode.M.BPROP Mth barcode of Nth message, print BPROP

       BPROP barcode properties:
	  message	 message_number      message_position
	  matrix_size	 data_codewords      error_codewords
	  rotation	 data_regions_count  interleaved_blocks

       MPROP message properties:
	  message	 data_codeword	     error_codeword

OPTIONS

       -V, --version
	      Print program version information.

       --help Display this help message and quit.

STANDARDS

       ISO/IEC 16022:2000

       ANSI/AIM BC11 ISS

BUGS

       Email bug reports to mike@dragonflylogic.com

AUTHOR

       Copyright (C) 2008, 2009 Mike Laughton

								 September 4, 2009						       DMTXREAD(1)
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