Full Discussion: awk matrix problem
awk matrix problem Post 302337306 by philstar on Thursday 23rd of July 2009 07:51:21 PM
07-23-2009
awk matrix problem

hi there
I'm very new in programing and i've started with awk.
I'm processing 200 data files and I need to do some precessing on them.
The files have 3 columns with N-lines
for each line a have on the first and second value is the same for all the files and only the third is variable. like this:

file1
0.003 0.004 4
0.005 -0.003 3
-0.023 0.423 2
...
file2
0.003 0.004 5
0.005 -0.003 4
-0.023 0.423 8
...
...

I need an output that can give me a matrix than the 1st and 2nd column are the same but the 3 must be a mean of all the values of all files

outputfile
0.003 0.004 mean
0.005 -0.003 mean
-0.023 0.423 mean
...
...

i have another problem cause' sometimes the value in the 3d column is not a number (NaN) and I can't count that one for the mean.

Can anyone give me some ideias
 philstar View Public Profile for philstar Find all posts by philstar

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```ISCNTRL(3)						   BSD Library Functions Manual 						ISCNTRL(3)

NAME
iscntrl -- control character test

LIBRARY
Standard C Library (libc, -lc)

SYNOPSIS
#include <ctype.h>

int
iscntrl(int c);

DESCRIPTION
The iscntrl() function tests for any control character.  The value of the argument must be representable as an unsigned char or the value of
EOF.

In the ASCII character set, this includes the following characters (preceded by their numeric values, in octal):

000 NUL	   001 SOH	 002 STX       003 ETX	     004 EOT
005 ENQ	   006 ACK	 007 BEL       010 BS	     011 HT
012 NL	   013 VT	 014 NP        015 CR	     016 SO
017 SI	   020 DLE	 021 DC1       022 DC2	     023 DC3
024 DC4	   025 NAK	 026 SYN       027 ETB	     030 CAN
031 EM	   032 SUB	 033 ESC       034 FS	     035 GS
036 RS	   037 US	 177 DEL

RETURN VALUES
The iscntrl() function returns zero if the character tests false and returns non-zero if the character tests true.

COMPATIBILITY
The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales with large character sets is considered
obsolete and may not be supported in future releases.  The iswcntrl() function should be used instead.